Hi Gents - I am replacing my radeon 6970 with potentially an asus gtx 680 top 1137 MHz. I would really appreciate some help in confirming this decision ! I don't require a 4GB card (at least to my knowledge, but I cannot find many good bench marks comparing 4gb cards to 2gb alternatives). Also the slight gain over the 670's is something I am investing in. Any help or your own reviews are appreciated!