In reply to The_flying_climber:
I've been pleasantly surprised with the Scarpa Rebel Lites so far. Bought them with similar objectives in mind to yourself. Also thinking of UK mountain days where a more "technical" fitting boot may be a benefit. I have a wider forefoot, but having several pairs of Scarpas already, decided to try the Rebel Lite. Only tested on a few Scottish winter days so far. Although they have less insulation, a slightly thinner sock avoided restricting the circulation in my feet and found them to be comfortable and usable in the conditions. The tongue appears to be neoprene, so not sure how waterproof they would be over long wet days.
I used them with Grivel G10s, but have purchased a pair of flexi bars to fit to my Airtech crampons with the heel clip. Planning to try these over the next few weeks. Boot has a bit of flex but feels more than stiff enough for crampon use.