Just to clear thing up it's actually RD600 for the chipset, R600 is the codename for the video card.
DFI will release a 680i chipset around January, tottaly different layout. In my humble opinion, the real killer 680i boards should come from Abit and DFI, the striker seems like marketing to me.
@swany, if you have the luxury of being able to wait, I would hold of until january, the 680i will have matured, we will have a direct comparison with the RD600, I dont know if you're set on the video card but ATI will have it's offering by then.
Buying a PC is tricky, new stuff comes around every 6 month( total generality), like Core 2 Duo in august 2006, then all the good motherboard in january 2007. So then you don't want to by new un-tested stuff but when it's tryed and proven, new stuff is around the corner.
Anyway in january, we should have a clearer picture of the whole computer scene and be able to make an educated buy(as far as intel motherboard/graphic card goes)