For $160, you can get a Radeon 5770 HD, A card that will performs 'great' upto 1920x1200
For $130, you can get a Radeon 5750 HD, A card that will performs 'good' upto 1920x1200
Both supports DirectX11.
An un-beaten card at $105 is the Radeon 4770 HD.
GeForce 9800 GT, a great, great card for $90
Exceptional 1680x1050 performance in most games, 1920x1200 in most games with lowered detail
Radeon 4670 HD, a great card for resolution upto 1680x1050 for $65
All of these are the good ones