I am currently split between getting one nvidia 580 and possibly in the future adding another one through SLI. Or getting two 6950 2gs and overclocking them with crossfire. What would be the best option. Or possibly two lesser nvidias and getting a motherboard with 3 slis and adding another one in the future. Basically what are your guys opinions for optimizing graphics on games such as skyrim, star wars the old republic.