Re: Upgrading Video Card
5850 and 5870 have deals come up for about $150/$199 (today).
At those prices these are the best bang for the buck out there.
Outside of that, you have the following choices
460 1gb or 6850
470 or 6970
560 or 6950 1gb
6950 2gb
570 at top of your budget (wouldnt recommend 6970 since you can unlock 6950 to that)
I would look into your CPU bottlenecking, it might prevent some 570 performance.
If I were you I would just go with 6950 2gb and unlock it, just make sure your CPU won't bottleneck and your PS is proper.
Main Rig |Lian Li PC-K58W| Antec 750W HCG-750 |Intel 2500k SB |Gigabyte GA-Z68X-UD3H-B3|Patriot 2x 4GB| 2x MSI 460 1gb Hawk in SLI |Seagate 250gb|Samsung 24" 2433BW|Logitech MOMO|
PC 3 |Ultra Aluminus|Ultra 500PS|Intel E8400 3.0|Gigabyte GA-EP45-DS3L|OCZ 2x 2GB| VisionTek 4870 512mb |Seagate 250gb|Dell 20.1" 2007fpw|
HTPC|Antec New Solution HTPC Case|AMD X2 4000+|Gigabyte GA-MA69GM-S2H|Corsair 2x 1GB|ATI 5450|BlueRay|Seagate 250gb|Samsung 40"|