To be honest, Intel CPUs benefits more from tight timmings than faster frequency.
What's the major purpose for this build? If it's gaming/ video editing/ 3D modeling, then your ram are perfectly fine.
If you really want the best out of the best, and to get insane benchmark results, you can look into the Corsair Dominator Platinum.http://www.amazon.com/Corsair-Dominator-Platinum-Desktop-CMD8GX3M2A2133C9/dp/B007Z1CVIG/ref=sr_1_14?ie=UTF8&qid=1358566277&sr=8-14&keywords=corsair+dominator
They have pretty high frequencies but still have a relatively tight timming. However, buying 32GB of those ram can cost you a fortune.
You won't see much real world performance boost tho.