The Polaris Edge sleds with the 700 engine may be in your price range. They have good power and have a great ride on the trails. Sleds from 2004 and beyond will have the Polaris Electronic Reverse Control (some of the 2003 sleds had it, too.) Set up right, you can easily hit in the 90's. With some work, triple digits can be had in the right snow conditions if you have a need for speed.
2007 RMK 700, 2008 RMK 600, 1995 AC Prowler 2-up, 1980? AC Cheetah