The 9500pro like he said is a good choice. Though it's retailing at $299 I think, just like the 9700pro, it will probably be a little lower. Possibly $225 by December. But even then you would need $75 bucks.
Who knows? Maybe by then the Ti4600 will drop under $200.
A safe bet is a Ti4200. By then they will be close to $100. And you will be $50 closer to an NV30 next year. If you're into that sorta thing.