@Les
That's a great breakdown of it. Thanks! And thanks to everyone who responded too.
I actually decided before I'd seen your post, Les, and I came to a very similar conclusion albeit based on a few other factors I didn't post.
I enjoy playing ArmA II pretty much weekly with friends and I think I'll stand to benefit a great deal from the GTX 580 with that title so I went ahead and ordered (actually found an instant rebate on an eVGA GTX 580 at ncix.ca). It certainly won't hurt to have it onboard when CloD unlocks on the 19th.
I'll worry about overclocking another day.
Now, to do some more database design freelancing to pay for this sucker
