I am looking to upgrade my dell studio xps 8100. i5-750 processor, ati hd 5770 graphics card, 16gb ram. wondering if the nvidia 560ti is a good upgrade along with the corsair 650tx power supply. Also looking to find an i7-870 to replace the i5. like some more info on the video card as far as best manufacture to get. read everything on forums from msi to evga. I really have no idea. if there is a better card in the $300-$400 range I'll consider it. I mainly play wow and d3. i used to be able to run a 25 man raid on ultra settings but now frames have dropped down to 50-less on good settings.