Why would someone buy the AMD R9 290X vs GTX 780 SC ACX? Every benchmark I have read says that the GTX 780 SC is slightly more powerful then the 290X. Am I wrong? I just bought the GTX 780 SC for 500 on Amazon with the 3 free games thing. Should I have gotten the R9 290X with Battlefield 4 for 599 or did I make the right decision? This is for gaming at 1920x1200. Maybe 2K display in the future. Thanks.