I have the 9800GT It cost me $179 Australian Dollars. My friend has the 280 and he payed almost double possibly a bit more and there wasn't much difference. I tested call of duty 4 on maximum graphics for both cards and there was no difference. So in my opinion go for the 9800 and wait till a new card comes out in about 6-7 months and possibly get that one
Intel i7 4770k 3.50ghz, 32gb Corsair Vengeance RAM (8x4 kit), 2 x 2TB WD Black HHD, nVidia 770GTX 4gb OC, Asus Z87-A Motherboard, running Windows 7 64 bit.