Okay so i am looking to build new rig still. I have made a couple posts getting some info on parts for the comp. I was wondering what the consensus is on video cards right now. I am looking at spending about 350-400 on the video card set up. My question i guess is this: is it better to go with 1 higher end card (HD 4870) or 2 slightly lower end cards (2x HD 4850). What kind of performance differences will I see with the 1 vs 2 card set up?

thanks in advance for the help