I would pick banshee because I love 2 strokes.

 

i'd take the raptor 700 before the banshee or yfz450 because theyres no replacement for displacement and it have a good hanlding this year(FINALY) and has gobs of power and torque..I bet a mod 700 would beat the crap out of the 450 (mod for mod)

 

YFZ450 hands down, Lighter and faster.....

 

First off if you can afford to buy a new 06 and plan on drag racing it no one is going to leave it bone stock for long so to me that's a moot point.
All are good bikes and it's just a matter of personal preference and how much money you want to sink into the machine. It's going to be along time before anything 4 stroke is going to dethrone a highly modded Drag Banshee.
The owners of the fastest 4 stokes I've seen all seem to have one or two even faster Banshee's in the trailer in case they didn't bring enough with their 4 stroke [img]i/expressions/face-icon-small-wink.gif[/img]