In reply to NeillyBonkers!!!!:
Good advice and help in the shop is important, but so is trying different makes of boot, built on different lasts. Ring ahead and ask what stock they have in your size (+ and - 1 size) of what makes/models.
My feet are too wide for a Sportiva boot, but Scarpas generally feel great FOR ME.
Personally, Scarpa Charmoz are just about the best boot I've ever owned, and come out for everything I do except steep Ice Climbing (Scarpa Jorasses then)
Ultimately the best person to fit boots for you is yourself - don't be afraid to spend 20minutes walking round the shop browsing whilst wearing new boots, and be sure if they press in the shop, they're going to kill on the hill.
Enjoy the shopping!