Asus P5B or P5B deluxe?

[dermofo]

Hi, I'm building a conroe sys and looking for some advice to which mobo will best suite my needs. I'm not looking to do SLI and I have a creative audigy card, so the SLI and HD audio fo the deluxe version don't matter to me. Not looking to OC either. So far I have purchased a PCIe-16 6800GS, Antec 550 truepower, and a nice case. I'll probably just get some A data ram and a 6300 conroe. I can transfer two sata drives I have in my current setup. I mainly will use this for multitasking (bit torrent, web browsing, dvd burning, and some casual gaming like bf2 and hitman). So I think the lower asus fits my needs pretty well but would it support a 6600 it I wanted the larger cache later on? I'm not new to building but it has been a while. Thanks a lot.