Seeking Knowledge wrote:
8. CORSAIR RAM Vengeance Performance 2 x 4 Gb DDR3-1600 - PC3-12800 - CL9 (CMZ8GX3M2A1600C9)
8. G-SKILL RAM RipjawsX Series 2 x 4 Gb DDR3-2133 - PC3-17000 - CL11 (F3-17000CL11D-8GBXL)
Go with the g.skill. Even if you don't actually clock it up to the higher speed you should be able to tighten the timings.