To SLI or not to SLI
PC gamers looking for a video card that can run all current games well, without costing them a fortune, are well advised to go for a GeForce 6600 GT. The 66GT isn't the One True Chipset that's streets ahead of every other option in bang per buck, but it's not too expensive, and it's a solid performer at the moment, and it won't be excruciatingly out of date in a couple of years........
So. Winchester-core A64s good, SLI 6600s bad, SLI 6800s a better idea, but you'd better bring a fat wallet and be prepared for occasional computer misbehaviour.