I am currently stuck making a decision and I would like some help My system specs are AMD Phenom IIx4 3.0ghz, M5A97 Asus mobo, 8gb HyperX Ram 1333mhz, Seagate 500gb HDD, Antec Green Efficient 500w PSU, Raidmax Atlas Case, gpu temporarily until I return it to best buy is a xfx Radeon 6750. For some reason the 550ti i originally purchased would not work with my system idk y just didnt. To be able to use my system I ran to best buy bought a 6750 that i will return once i make a decision (good idea if you have the cash to see if your video card is causing the errors or your system). Now the 550ti was on sale for 109.99 and from research is slightly better than the radeon 6770. At the time they were the same price. Here is the dilemma radeon 6850 is currently on sale for 139.99 gigabyte no less. But the sapphire radeon 6770 is 99.99 89.99 after rebate (6850 is 119.99 after rebate) both of which i have to wait 30 days before filing. I know gigabyte is usually awesome sauce when it comes to warranty's RMA's etc but I do not know much about sapphire. That is my first question which company is better or are they equal in customer service. Also will i get better performance from one 6850 or crossfiring 6770s? Thanks for any input on this dilemma. Notice my mobo is crossfire able. Thanks again.