In reply to Mr. Lee:
> Scarpa Rebel Ultra GTXs
> Not been able to try in my size. Not sure whether I could get away with the Rebel Ultra GTXs for warmth?
Haven't tried these, but from what others have said if you're used to Omegas I suspect these would be too cold. Uisdean Hawthorn had a pair in the Envers last September and he mentioned they were on the cold side.
Phantom Ultras have served me well for Scottish and Norwegian Winter, so I suspect Guides would be fine.