OP, I've ran the gambit of DDR3 ram, in 3x2Gb and now 3x4Gb. I've found G.Skill to offer a wide range of speeds (as are many manufacturers, but they started the trend) because they test and bin their modules. Mushkin have some great kits, and have solid feedback. They started making the Ridgeline for the X58 platform which proved to be great kits. Corsair and Crucial (Crucial makes the Balistix) have made some higher priced kits which proved popular, but the other companies caught up to their higher end kits, which brought their prices down a lot.
Having said that, If you want to get the best price/performance ratio, I recommend getting DDR3 1600 at CAS 7 timings. Mushkin has a 3x2Gb kit for $65 and are rated at 7-8-7-24. This is the best price for some tight timings at 1600: