Number one, don't go by the price. What you save up front, most likely you'll be taking it back for repairs, that's how they make up the difference. I would avoid Polaris, Arctic Cat(now Textron) and Canned Ham like the plague. We have a number of guys in our ATV club that bought the above 3 and have suffered, brand new machines that break down, parts not available and had to cannibalize another brand new unsold one for parts. Engine size isn't the end all to everything either. Yamaha, Kawasaki and Honda are reliable with Yamaha having the highest ground clearance if I'm not mistaken. From personal experience we had 2 Yamaha Kodiaks at work, used for plowing parking lots in winter and trail riding during the rest of the year. Over 10,000 km, new tires a battery and a light bulb on one, the other needed a new battery with slightly less kms. I've got my own 550 Grizzly, one battery in 8 years. That's it. Just opened the belt cover last week, no wear or belt dust. The Ultramatic transmission is what they call bullet proof. The unfortunate end to this info, work now has 2 Canned Hams, 650 2 up, one has spent more time in the shop with electronics and transmission problems, the other also has electrical gremlins.