My Buddy had a Bombardier (same as your buck). It was a 650 too. It had decent power, and was a great workhorse, but for playing and trail riding I'd steer clear of it because its a straight rear axle quad, so its gonna ride like crap. There just made to yank some equipment around, and not really be super cumfy and fun. Bombardier dropped them because there wasn't a huge demand for a strictely work ATV. People want a cumfy atv that rides nice and can still get the work done.
They were solid ATV's though.