Personally, I would bin the i7 for the i5 750, get rid of liquid cooling and go with a good air cooler, drop down to 4gb dual channel G Skill ECO 1600mhz CL7 as 8gb is pointless for gaming.
Get the Asus P7P55D E Pro motherboard
Get a decent 850W Power supply from Corsair
Drop the sound card as you don't need one