Soup - personally I hate ASUS....a lot of people like them and I'm sure it'll be fine for stock uses....I mainly hate it for OC'ing plus their tech support is crap....DFI has great tech support and two of the reps are even members who frequently post at www.dfi-street.com
so it's really easy to get help.
The DFI Ultra-D board has a LOT of options in the BIOS, primarily the RAM settings, so it can be overwhelming for someone who's not used to messing around in the BIOS.
That TwinMOS I linked will save you $40 and will perform just as good....it has a cas latency of 2.5 instead of 2 like the corsair you want, but trust me the Cas latency doesn't play a significant role in performance...the two middle numbers do and they are the same.
Ultra-D + the TwinMOS I linked would be a good combo while saving you some cash.