|"tossup between 8500GT and ATI 4750"|
You've got to be kidding? The 8500GT shouldn't even be classified as a gaming card - it's very low end. The HD 4750 was rumored earlier in the year, but is just finally becoming available. If your choice is between the two, it's a no-brainer...the HD 4750 is a MUCH better card. But the HD 4870 recommended by jackbomb is even better.
Best Graphics Cards For The Money: September '09