I am trying to build a new gaming system based around the video cards i already have. I already purchased 2 GeForce gtx 460 768mb video cards. I was hoping to use the new sandybridge I7 2600k processor, but in truth i don't know what combination of parts would be best. I am also trying to keep the total cost around 1000 bucks. I already spent 300 on the video cards so i have about 700 left. Thanks