I have a very wide foot (Dor E), so i was recommended garmont over scarpa, and i have been very happy that i listened. very comfortable w/ $30 superfeet insoles, and i wear them @ 10 hrs/daily when working on the mountain. i would consider myself an intermediate tele skier, so 3 buckles has been fine for me. now i might go for 4, but compared to the old school boots, you can't go wrong.... synergys are considered the crossover boot for BC/and area skiing (more flex, shorter and less buckles)
as a generalization... scarpa or crispi for narrow feets, garmont for wide....