Hi newcomer and welcome to the Tom's hardware forum.
1- That is a very good mobo but if u want take a look of other options currently I have the Gigabyte 890FXA-UD5 with a X4 955.
2- Get this G.Skill Ripjaws 1600
are much better with a fewer price.
3- If u want OC I think that u need a cooler some goods are the Hyper 212+, Titan Fenrir, Megahalems and NH-D14.
P.D. The Gigabyte 890FXA-UD5 has the RAM slot very near to the CPU socket and that can be a problem i u want install a cooler with dual fan setup.
IMO is a solid build plus the Crossfire is very good.