In reply to Jimbob11:
I currently own a pair of both La Sportiva G5 and some Trango Evo Extreme, which seem quite similar to the tower from what i can make out.
The trangos have been fine for just about every day i've had in scotland from winter walking to V,5 , with one case of cold feet when hanging around on a belay for about 50mins, surprisingly comfortable and excellent for longer ridge walks.
I've only had the G5's out once so far as I bought them to take to Rjukan where its a lot colder and a lot more standing around, found them surprisingly light on my feet and really happy so far with them, one warning is that there not as waterproof and to be careful when river crossing.
For both boots immediately replace the footbeds, the original ones are like strips of cardboard...
Hope that helps!