These are the choices, both are high performance but i recommend going to the second one.
CORSAIR DOMINATOR 8GB (4 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model CMD8GX3M4A1333C7http://www.newegg.com/Product/Product.aspx?Item=N82E16820145284
lower latency means higher performance.
if you are on a budget,the one which is stated above would be best,
CORSAIR XMS3 8GB (4 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model http://www.newegg.com/Product/Product.aspx?Item=N82E16820145261