Im building a new system and I have been trying to decide on a graphics card for a long time, my decisions have come down to the EVGA GTX 770 Classified Sli and the PNY GTX 780 Reference card in Sli (The PNY card has lots of good reviews, from what i heard lifetime warranty, its reference so its the same as the other brands). I have seen many reviews on both but they seem to perform very much the same i just need help deciding so guys comment your answers and tell me whats better, THANKS!