well for one if you sell your banshee you are definetly gonna lost alot of money on it even with the mods.
in my opinion, i actually like the look of the banshee better. It just give you that feeling. The yfz looks just like all the other quads. Now wit performace, that is debatable. If your not gonna race, why get the 450?? its a race bike, thats what yamaha made it for.
But thats just my opinion.