Originally posted by Dl5treez
Arctic Cats have Suzuki engines and tranmissions. From what I've heard about them they seem pretty good. They'd be close to the top of my list as well.
Yamahas are great machines, very strong, parts are easy to find and relatively inexpensive as far as quads go. I have a friend with a Kodiak 4x4 auto. I've ridden it quite a bit, awesome machine.
Polaris has the *gimmick* ATV of the moment. They seem pretty nice, but to be honest--even though you'll hear the exact opposite from most everyone else who will post hear--from what I've heard of from people who own them its either a love it or HATE it machine. Fit and finish is a little lax, lots of power, but pretty spendy to repair. Some of the models don't have engine braking unless you're going about 20 mph. BUT they have the *Made in USA* thing going for them, so right now they're the hot gotta-have-it.
Me? I have a Honda Recon and a Kawasaki Prairie V-Twin... . love them both.