this or that

[silverphoenix]

7900GS for $199.99 or X1900XT 256 for $239.99?

I'm having a hard time finding a few reviews of the 256mb vs to compare to. and why is this one so cheap, its even cheaper than some x1900gts

http://www.newegg.com/Product/Product.asp?Item=N82E16814102051