Don't know, 2X2GB run cooler than 2X4GB. Also, keep in mind 2X4GB is more efficient than 2 sets of 2X2GB. Running the RAM above 1066 MHz 'is' OC and if you OC your CPU and run hours of gaming then it's nothing that I would do... Contact Crucial and get their take on this situation.
Alright, I got a confirmation saying the Mushkin RAM will work with my motherboard, they are 2x4gb and include heat spreaders. I also found them on sale for $94. The Crucial RAM was $96 when you added on the shipping and handling costs. So I think I'm going with the Mushkin RAM, thanks for all the help, greatly appreciated.