I've heard greath things about the DFI, especially w/overclocking, so I'd lean in that direction. On the budget side, I like my VNF4/Ultra pretty well, although the shipping BIOS blows. The new BIOSes are pretty good, except for some 1T command rate issues I'm having. Anyways, performance is good, features are good, and overclocking is good, especially for a $120 board.
BTW, I think you'll find it a bit hard to stop overclocking at 2.2GHz. I said the exact same thing, and look at my CPU now! I may even try for 2.6 soon! The fact is, when you see how easy your CPU can do 2.2, and how cool it still runs, you'll get the itch to push it further. As such, make sure you get a board that can hit some high FSB speeds - boards like the ECS that only go up to 250MHz just aren't gonna cut it.