Hey Guys, So my cab has some pretty nice gear in it. 21 inch Arcade Monitor Asus rampage x48 formula Xenon 5.2 ghz dual core (on air rock solid) Hyperx 4gb 1044 DDr2 Corsair PSU Mid ranged Graphics card. Looking to buy the Performance Enhanced RV630 512Mb Version, However is this worth the money anyone used one? Pros? Cons? Was looking at either this or a Gtx260 or higher IS the only pro about this card the fact that its native 15htz ?