i have a 09 700FI Grizzly and i love it.It has on and off 4x4 and front diff lock which i really like i have used it to cut and haul firewood, drag tree tops out of a tangled mess in a logged woods, plow snow, and just all around trail riding. it is fast and reliable and anything with fuel injection is a major inprovement over older carburated models. my buddies have 850 polaris's, 750 brute forces, and 750 king quads and my machine is just as or more capable than theirs. The grizzly is a single cylinder motor while the other ones are vtwins. the grizzly seems to have more low end power with the single cylinder than theirs.its all in what your personal preference is the only thing i like better about mine versus mine buddy's new 2010 850 polaris is that mine weighs 350 pounds less, will still pull as much, and run right with him in on the straight aways. In the woods mine is much more agile and shorter wheelbase which makes it easier to manuver and faster on tight trails