Ok, the EVGA GeForce 9800 GTX 512MB seems well supported, I could go with it as long as it has good preformance in gaming. Surely someone could assist me with some anwsers on this one. Does 10.5.6 for example support it in SLI (there wasn't any info about this in the x86 hardware compatibility list)? And is there any big advantages of OpenGL 3.0 compared to 2.1?