Overall, I am very impressed with the Ripjaws X 2133Mhz RAM. They retail for $73 (2 x 4Gb kit) and are also available in larger 2 x 8Gb kits not to mention the wide variety of Ripjaws of different speeds and timings to allow you to find the RAM that perfectly suits your needs.
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips