need help building rig!!!

I do graphic design and 3D animation/video/special effects (and some gaming on the side) and might need a stronger rig for more of the heavy lifting. (PLUS its black fridayish so riding that wave...)
Its my first rig and this is what i got so far. I will be doing some mild overclocking so i probably wont be doing much for cooling as of now.

i7 920
Asus P6T Deluxe II? (Rampage II is just an extra $5 for the combo on Newegg at the moment...TEMPTING but i think thats overkill imo... iono)
2x Caviar Black 750GB 7200RPM (planning on RAID0)
ATI sapphire 5850 (When theyre back in stock...)
GSkill DDR3 3x2GB 1600
antec nine hundred (FOR $60 YESS)
Not sure about PSU yet... any suggestions?

So thats what i got so far... havent bought anything yet and wanted to bring it before a panel =] any help would be welcome ty in advance.