I can agree with a different motherboard, but a P5B is like $100 more than sammy originally chose.
Instead, I would recommend this:
I agree with the above comments to not go Crossfire (or SLi for that matter). The only situation where I would even remotely recommend either is for someone who has an overly fat wallet who likes to waste money. Go with a 8800 GTS or another 8800 card depending on how much money you would like to spend.
PSU: ORSAIR CMPSU-520HX 520W
http://www.newegg.com/Product/Produc...rd Drive - OEM
The RAM that was above mentioned will work fine.