I dont want to run CF just yet, but sometime in the future. Is there anything here where you think "why not this part instead"? I dont care for USB3 or SATA3, but i could be nice. But only if it's usable without crippeling CrossFire.
If need Usb3/sata6 go the Asus route, or as I did got the P55-UD4p (I'll pick up a pci card when I can use/need Sata6 (only think that would benifit is Raid0 SSDs). They have just started coming out with USB3 thumb drives. PS Love my P55-UD4P.
On ram, I selected the Rpjaw Cl7 @ 1.60 Volts (love it, but its about 20->30 Bucks more than same @ 1.65 V).
Don't forget PSU, Which one are you condemplating, a GOOD one I hope. There have been several post from people who have neglected this Important Hardware.
System P55-UD4p, 4gig Ripjaw CL7 @ 1.6 V, I5-750 OCed to 3.6 (Stable @ 3.8), 2 HDDs, On Intel G2 80 gig SSD, ATI 5770 Gpu. 1 Blu-ray writer, one DVD writer. ( not in my config yet as I'm still playing with it and have not loaded all software)