Thanks everybody. Budget-wise, I would like to spend under $200. Renz, a new monitor is on the wish-list, but kind of secondary to the new card right now.
I like the idea of a 6770; my only concern is that the 6770 could be something of a sidegrade. From what I've read, the 6770 is basically the 5770 repackaged, which, depending on the game, is marginally better than the 4870 (at best). The 4870 isn't too far off from the 4850. I guess I'm wondering if it would be worth the money to grab a 6770 or just wait a little while. Thanks for your input!