it seems like all the 450's work pretty damn good, the fi bikes do seem to run cleaner on the really deep days, but i know plenty of guys that have carbed bikes that work awesome, i thin the main thing is just find one you can afford and ride the piss out of it!
I agree to that!! When I was hunting for a bike I was torn on what to get. I wanted the button so I ended up getting a 2010 KTM SXF 450 which is carbed, put in a jet kit, gutted the airbox and did a pod filter. It runs great!! I have been in several DEEP pow days and besides having to knock snow away from the filter from time to time, which everyone had to do no matter what they were riding, it has run very well !