Okay, but I've got the evga 680i. I don't know how much room for "future upgrades" I really need. Don't these newer quad core processors run at a much higher FSB than the 680i can provide? When I upgrade, I'll upgrade the CPU for sure, and I think I'll have to upgrade the mobo as well. So wouldn't it be better to wait and get some of that better RAM a year or so in the future when I get everything else?
Only if you overclock. The fsb is fine if you run the cpu at stock.
And yeah, it's up to you.