On the chipset angle, I have to trade off -- or optimize -- between "bleeding edge" and "reliable, mature, debugged" operation.
If the chipset is compatible with the latest processors, then the drawbacks may include earlier version of disk controller, compatibility only with prior PCI-E standard -- things like that.
Getting a good board with the 680i chipset was a gamble for me -- not the sort of thing I usually do. I waited until it had matured a bit. Now a should be looking at the newer intel chipsets. With my "gamble," I'm not in a hurry, but a lot of people have grown disgusted with nVidia 680i.
I'd think, though, that there are enough boards released through latter-2007 that have a track record, it's probably worth it to go ahead now.