I can't say anything about the Rubicon because I've never driven one....

However I will say that I've got both a Polaris Sportsman 500 and an Arctic Cat 500 Auto. Both ATV's have treated me well. (No problems with either) They both have their own strong points and weak points.

For the kind of use I put the ATV through, I like the Arctic Cat better than the Polaris. The Cat has much better ground clearance (I think it is the best on the market). The Cat also has longer wheel travel than the Polaris. So it will climb over fallen trees and rocks without hitting the skid plate much better than the Polaris.... I hate the feel and sound of the skid plate scraping all the time....

The Polaris is faster than the Cat... I think that is because the Cat is geared lower. Since I never go over 20 MPH in the woods this isn't an issue. If you are going to do a lot of hi speed 4 wheeling, I'd recommend staying away from the Cat. But if you are going to use it as a work horse (Like I do) or a rock climber, I highly recommend it. I have a feeling that the Honda is also faster than the Cat.... The Polaris also gets better milage than the Cat. (Again I think this is due to the gearing)

My ATV's are used in thick heavy woods for pulling plows, discs and trees. I typically cut down a tree in the woods, top off the branches and drag the rest to my hunting camp to be cut up... I also use the ATV's in my food plots for pulling the discs and other attachments. Both the Polaris and the Cat do those things well.... but the Cat can just go places that the Polaris can't due to the ground clearance.