Things have changed in the last couple of years and it continues tobe for the better!
Scrapa Rebel Ultra size 45 1# 14oz
Scarpa Phantom Ultra size 45 weight 2# 4oz
La Sportiva Trango Extr Evo GTX size 45 weight 2# 3oz 
La Sportiva Batura 2.0 size 45 2# 2oz
La Sportiva Trango Extr Evo GTX size 45 weight 2# 3oz 
Largervolume on the left, the Batura 2.0 and the smallervolume, the Rebel Ultra, on the right
All these boots fall between these two for volume and warmth.
weights are PER Boot:
Scrapa Rebel Ultra size 45 1# 14ozLa Sportiva Batura 2.0 size 45 2# 2ozScarpa Phantom Ultra size 45 weight 2# 4ozLa
Sportiva Trango Extr Evo GTX size 45 weight 2# 3ozZamberlan Paine GTX 2# 8oz(how much do
your gaiters weigh?)
Every boot listedhere except the Trango has a gaiter built in.
All are Goretex lined. Except the PhantomUltra. Which is notable imo.
La Sportiva Trango Prime is another boot that would fit this category.
http://coldthistle.blogspot.com//11/la-sportiva-trango-prime-trango-extreme.html
These are fiveof my favorite lwt single boots for
winter use. Given the option it is a hard
decision on which to choose when looking at the temps that will easily allow
any of them.
Soles flexibility depends on you shoe size. The bigger the boot the more flexible the boot sole.
All of these boots are rigid enough for vertical ice using the right crampons. "Right" crampon choice on these boots is the key toperformance IMO.
Scarpa's PhantomUltra
Phantom Ultra in use with a PetzlDartwin
I am a big boy weight wise. 190# stripped and a good bit more kitted out on the ice. The Scarpa Ultra (both versions) and a Dartwin is IMO a very good set up for vertical ice. This coming for a guy who really prefers a rigid crampon and rigid boot mid sole. I learned to appreciate the softer flexing mid solesScarpa has offered recently.
But given a choice I still like a fairlyrigid boot with lots of support. Thelighter weight thebetter, imo.
http://coldthistle.blogspot.com//01/true-love-dane-and-his-boots.html
Let me do a run down of my thoughts on each and let you
choose.
I have long skinny feet with very (VERY) narrow ankles. I'm a Size 45 or 45.5in theseboots. The Scarpa and Zamberlan lasts seem to fit me the best. I see a lot of comments saying theLa Sportivas are a narrower last. I am not convinced as I can wear any of them with little complaint.Best to always try on the boots you want to consider. I find all of theboots listed very close on sizing and lasts. Only toe boxes changing the fit very much and of course the lacing systems. For melacing systems are best designed, KISS. KEEP IT SIMPLE STUPID.They make or a break a boot in the end. I think that gets forgotten some times by the design teams.I run between a 45 and a 45.5 in all of these boots.
Here is my 2 second review on all of them.
Scrapa Rebel Ultra size 45 1# 14ozBest fit of the bunch for me in a 45.5 by far. Easy enough to get in and out of.Lacing is slick and ankle support very good. I like this boot. For the fit and support it offers for the weight I'll put up with the lack of warmth to a point. 1/2# per pair lighterthan the Batura.La Sportiva Batura 2.0 size 45 2# 2ozLikely the warmest of the boots listed. But the Phantom Ultra is right in there as well. Very flexible ankle and a high tech honeycomb carbon mid sole. Hard to notlike this boot. I find the lace system annoying. If the lace system offered a better fit for methiswould likely be "my" boot.Scarpa Phantom Ultra size 45 weight 2# 4ozAdvantage Scarpa here. Almost the fitof a Rebel Ultra. Almost the warmth of the Batura. Heavier than either. Easy in and out. They dry faster than any of the GTXboots and they climb well. I suspect they dry faster because they never get as wet on the inside. The Goldilocks boot? May be. It needs a Scarpa update and to be imported into North America in half sizes. Likely never ever happen though. Phantom Guide is already well established in the market.La Sportiva Trango Extreme Evo GTX size 45 weight 2# 3ozSuper slid all around performer. This is the boot that needed a gaiter. One designed"out of the box."But a super hard boot to dry out once wet. I really like this boot for a lot of reasons. The best reason? It is simple and it works every where.....till it gets wet inside.Zamberlan Paine GTX 2# 8ozOld school fit and finish. Which are good things. The mid sole is pretty rigid and very supportive. They fit almost crampon exceptionally well. Not every boot here does. They are a bit heavy. But the craftsmanship and materials clearly show you why they are 6oz heavier per boot than the Batura 2.0. If you have the money for only one boot and need it to last for a while. This is your boot. May be the most comfortable boot of the bunch for me out of the box.FWIW until recently the Zamberlan boots were extremely hard to get a hold of in the USA. That has changed.I'll have full, detailed reviews up shortly on the Paine, Eiger and Denali versions. They are bootsyou will want to know more about. Took me 3 years to finally get a pair in hand and I think, worth the wait.
They areavailable here:
http://www.prolitegear.com/Zamberlan.htm
All but twoof the boots
offersticky rubber soles with minimal lug height. The Zamberlan Paine and the La Sportiva Batura 2.0 being the exceptions with a full size lugs. Makes short lugsa little slick in some snow conditions. But that is why we wear crampons isn't it?
I have heardof the Trango having too narrow of a foot print and being unpleasant on
trails..an "ankle twister". "BS" was my first thought...but I heard it more
than once and always from people I trust using the boot. Not something I
personally experienced though. And I have walked a bunch in the Trangos.
The Ultra is a OutDry lined boot. The
restGoretex lined boots.
All stay dry if you keep the water below
boot top height. The GTX bootsseems to retain more moisture from foot sweat.
Allare difficult to dry once wet.
More here on an Ultra and Trango comparison I made earlier. I was wrong on the Dart/Dartwin/Ultra combo btw. There are crampons that can be made to fit better but none more reliable and proven over the last couple of years nowthan the Scarpa-Dartwin combo.
http://coldthistle.blogspot.com//12/phantom-ultra-vs-trango-extreme-gtx.html
Lots of options these days to get a really good boot and more importantly to me a GOOD fit. It has not always been so in this category of boot. Some work to be done yet.
As I have mentioned so many times previous.
A super light weight double boot that will climb ice, under the magic1.5# in a size 45. And something you can actually dry in the field over night should be the on every one's mind.
Till then I will do my best to wear a few of these out!
One of my Althea or Rose of Sharon bushes. They are easy to grow elsewhere but I have trouble keeping enough water to them here. It is kin to the Hibiscus plant that is so common in Hawaii but this one can survive our winter cold. The bad thing about it that each flower only lasts for a day. 
Dauphine Island Ferry
Offshore Oil Derrick
Fort at Dauphine Island
Dauphine Island Bridge
The other day we decided we take a walk along the Rio Grande River near the Alameda Bridge. The cottonwood trees were beautiful as many had turned a lovely shade of yellow. We parked in the parking lot and walked under the bridge that had car traffic on it and then walked across the foot bridges and along the river.
