Thinking of pulling a pair of XFX HD 4850 GPUs to run in Crossfire @ 8x/8x. I am looking for opinions on this or a single GPU having similar performance at a similar price (if there is one). Are there disadvantages to the 4000 series GPUs that would sway a purchase decision toward a newer card? I was looking at a single HD 6950, but it is $100+ more than the 4850s and I don't see myself adding a second 6950 in the future (new rig at that point). Currently playing a little WOW and Starcraft on a X4 955 @ 3.8GHz, 4GB mem, and 9800 GT.
HD 4850 ($70 USD each) => http://www.newegg.com/Product/Product.aspx?Item=N82E16814150482&cm_re=4850-_-14-150-482-_-Product
HD 4850 ($70 USD each) => http://www.newegg.com/Product/Product.aspx?Item=N82E16814150482&cm_re=4850-_-14-150-482-_-Product