It's more than you're looking to spend, but I think this is a reasonable frame/fork combo for what you're looking for. You might be able to find something like this a little cheaper if you dig around a little. If you don't need the fork, then you could probably sell it for $100 or so. It's definitely a nice frame, though.
http://www.jensonusa.com/store/produ...+Frame+08.aspx