Umm ya nab a better brand mobo... Some cheap SLi boards ~100-110 can be had from Abit, Abit K8N SLi
Gigabyte, K8N SLi boards
Many people might not like or think of going w/ them, but I've had a very good time w/ a Biostar board I got for a friend... and from what I've heard/seen the T-Force is sopposed to be a good mobo with some nice OC options
Otherwise, it's $130 the cheapest DFi SLi board.
The psu suggested is much better, and I'd say go for a opty 165 too. For $40 you can get a DVD Burner, which beats the **** outta an ASUS DVD combo drive for only $10 more.