I've kicked the tires on Crucial's Ballistix Tracer PC4000 for the last few weeks and I really like what I see! Not only does Crucial give you RAM you can use to OC your system with, it also does something the Corsair RAM I have won't do. It will run at 2-2-2-5 latency settings at the default voltage and overclock a bit, too! If you run Intel or AMD in your rig, you owe it to yourself to give serious consideration to Crucial's Ballistix Tracer PC4000!