SEARCH functions are wonderful tools:http://forums.epicski.com/showthread.php?t=28745
But more importantly you didn't provide 1 lick of information about you as a skier (height, weight, shoe size, what you ski currently, where you ski, how many days a season you ski, what boots you've had in the past, etc...all of which is ESSENTIAL INFORMATION for anybody to even begin to posit a halfway decent answer to your rather broad question).
My 2 cents is that you should read up on the Boot bits that I've linked above. Then also check out Realskiers.com and read their boot fitting section thoroughly.
After you've done your reading homework then find a boot fitter near you (or if need be, wait until you take a trip to Utah, Tahoe, Colo, Sun Valley, Whistler or some other ski town/area) and start trying on boots. Try to find a shop that carries several (I would say at least 4 or 5) different brands.
You really won't get much from reading about different boots other than to narrow down models and brands based on whether or not your foot is wide, narrow, etc. Every boot fits differently. Technica fit different than Nordica which fit different than Lange (notorious for the "Bang"), etc.
So, to recap, read the info on bootfitting here on Epic. Then scuttle over to Realskiers.com and read their section on bootfitting. Then find a shop/bootfitter and prepare to set aside a day to try on several different boots.