If I listed a 900 would that change you opinions?
Yes...you rarely hear anyone make a comment that their machine has to much power, but you do have the other side. If you said a used 700 I'd even rate it over the 570. The 800's had heat issues. I specifically looked for quite a while trying to find a 2009 700...that's the new body style with the old motor, only year they made them.
If I was looking today...I'd look at the Ranger 900 and the Mule FXT....I'd probably look a the new Mahindra just because they are interesting and the seats look comfortable. Plus, Nav sells them and I've not seen a single neg review on him on this board...we aren't the easiest to please fwiw.