I have enjoyed my Gator HPX (2005). I made a few pix of it in the photo section, as it has a few modifications. So far, after thirty hours of use, I really like it. It has some real strengths, such as a marvelous job pushing snow with the 72" Eagle Plow I bought with it, and hauling things. It really hauls heavy loads well and can do so on any hill easily. I have the diesel and like it better than the gas model I demo'd before. The only complaint I have about it so far is that it lacks suspension travel thus one has to be careful off roading with it. It is also fairly wide, making getting into tight spots a little tough at times. For true off roading, I think the Polaris or the Yamaha are probably better as they have more suspension travel, but for hauling heavy loads and doing work related things, plus having some fun, the Gator is tough to beat. They look good too, which means something. Suspension travel aside, the Gator I have has never had a problem in any situation in which I have tried it, but my Gator has very aggressive tires and a little dealer mod to the front differential to help it too, so I cannot assess how it would do without those things.
John M