No need to upgrade. The 6870 and 6850 perform slightly worse than the 5870, but they are cheaper. But the 69** series haven't been unveiled yet, and obviously they will out-perform the 5870, but I would assume the price being quite high. If I were you, I would stick with the 5870 for a while, and if you are really itching for a few extra FPS, just get another 5870.
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The 288
Q9550 E0 stepping @ 4Ghz
Gigabyte EP45 UD3P
G.Skill pc2 8500 1066mhz RAM
Corsair TX750 Watt Power Supply
Western Digital 500gb and Seagate 500gb in RAID 0
Western Digital 250gb
Antec 1200
OCZ Vendetta 2 LGA 775 CPU cooler with bolt thru kit
XFX HD5970
Steelseries 7G Mechanical Keyboard
Samsung 305T 30 Inch 2560x1600 LCD monitor
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Steelseries Xai Laser Mouse
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