Thanks MpG. This ws exactly the type of info I was hoping someone could point me to. I haven't built a new rig for about four years and have never been a bleeding edge kinda of guy. I expect that I will have many more questions in the near future. Thanks again.
I suggest you simply go for a single 8800GTS 512MB instead, because exactly like MpG said, the memory bus on the G92 core is only 256 bit wide so it doesn't benefit much, if at all, from that extra memory. Also, I personally wouldn't go with SLI, a single, faster card is, most of the time, a much better choice.