Hey guys I have planned to upgrade my graphics card, and can't figure out which would be best for due to so many choices. I am running an Fx 8120 on a 990 ud3 board with a 880 watt power supply. I really cant justify spending more than 250 on a card. I am impartial to amd or nvidia. My board is also sli and crossfire ready. Thoughts? I am looking to buy before the end of September.