I am building a new Machine and I am going to use ASRock Z77 Extreme6 ATX LGA1155 Motherboard, paired with a Intel Core i5-2500K 3.3GHz Quad-Core Processor. I would like to order all of the parts at once, but I am having trouble deciding on the correct RAM modules to combo up with this set. I will be honest I really have a very ....very limited understanding of RAM and what all of the numbers and compatibilities are. I know that I am looking for x2 4GB sticks for a total of 8GB with the possibility of purchasing another pair down the road. The usage will be for gaming, and I would like to go wityh either a Corsair or a G.skill Ripjaws product, unless a solid reasoning can be given not to. Can you guys please post some ideas From middle of the road to best for this setup? and if someone feels really generous, explain the numbers a little bit? Any help is appreciated.