Ben, I have heavyweight winter boots but use them less and less for Scottish winter hillwalking (which may involve more serious stuff) as I find that the snow conditions rarely justify them. Instead, I use Scarpa SLs, which are available in wide, and have four pairs on the go. The best are for serious stuff, the worst for summer use around farms (in the course of my work), so I get full use out of them and always have a boot with good sole for snow and ice. I have used these quite a bit with crampons, in Scotland, Alps, Iceland, Norway, Atlas Mountains etc etc - and they're fine for trekking, too. I would use the heavies if I was specifically out to do ice climbs, but for the average day in the Scottish hills, SLs are absolutely fine.
