I would look at Kawasaki Prarie 650's, or probably even better if you are going to do some hard pushing, a older Suzuki King Quad.... Stay away from Polaris, they have a good ride and some nice features, but they are the least reliable units you could buy, especially the older ones.
2008 Toyota Tundra
2009 Wright Stander RH 52"
2008Scag Tiger cub 61"
2006 Husquvarna ZTR 42"
Stihl BR600 blowers
Kawasaki/ echo handhelds
37, Married, 7 year and 1 year old sons , Solo operator, Average 60-70 accounts, mostly residental, Been in business since 1994
When not working I am either flying, boating, jet skiing, or riding my motorcycles
Here is some videos of how I enjoy my time off http://vimeo.com/user2428477/videos