Looking for opinions on these two cards. The Egg has A Sapphire HD 4830 for $84.99, OR a friend has an UNOPENED XFX GTS 250 Core Edition which he will sell to me for $70.00. Fanboism aside. Which card gives me the most graphics punch? Pros and cons as I see them: 1) I have an AMD chipset so that raises concerns about compatibility. (Possible con) 2) Nvidia has Physx and Cuda. (Pro) 3) Nvidia has higher clocks. (Pro) 4) The Nvidia is a power hungry monster and not 100% sure my PSU can keep up. (Con) ** I have a second 430 watt Antec PSU that I could rig up for the video card only!! So ok VPU Gurus. Help me out... Oh, and the clock is ticking as my friend has some else interested in the GTS.