is 8gb ram overkill? Im not really going for the best of the best but i am going for a computer that will last 8 years. something to be able to play current games and ones that come out 2010
the 4890 is definitely NOT cheaper than the GTX260, however it does outperform it.
The 275 will probably cost you about 20 bucks more, but it will outperform the 4890
Get the 4890 (if you can't find a 5850) if you prefer ATI, or a GTX 275 if you'd rather nVidia
My mistake, the gtx260 it's $10 cheaper give it or take it. Nevertheless the HD4890 it's a better option.
On the other hand the gtx275 it's $30 to 50$ more expensive regarding the HD4890 so, in my humble opinion, I still recommend the HD4890.