If money is not a problem go with the 2-4 wheel option. It adds more fun on the trails. Tim

 

I have a '95 King Quad that has selectable 2wd/4wd. It's great, however on a QR500, it may be fun but I'm not sure of the benefit. If you want it just to be able to kick the bike around trees and tight turns on the trail, ya don't need it. I've found that the 500 has plenty of power for that even with all-time 4wd. HTH

 

Wouldn't the 2 wheel drive option make it easier to steer?