We had a polaris sportsman 500 that we got a super deal on. I wasn't a polaris fan, but we beat that thing to death and had no problems. The only thing was replacing belts, but thats because we were tearing things up and working it. Flipped it onto myself once, that was a big...and painful.... mistake. I have no other experience with polaris. But I know that sportsman took everything we gave it. Finally ended up trading it for a 4 wheel drive kubota tractor. Very good trade there also.
-Jake