Well like you said you might cf/sli. 90% never do. All I'm saying is that is more reasonable to get better GPU for the money u save on getting single pcix MOBO then cf later on. I put i-5 2500k and HD 6950 built for 800 (shipping and taxes included) after MIR.
But if you insist then choose diff MOBO. Also MSI Mobo designed poorly and if u do cf/sli second gpu will cover some of the SATA slots.
happy to help to refine your build or throw some options at you