take a look at this - http://www.tomshardware.com/reviews/dual-channel-ram-ddr3-4gb,2618.html
at the end you'll see this :
"We recommend G.Skill’s Trident DDR3-2000 specifically for mid-budget overclockers who believe in the importance of memory speeds beyond those we’ve found to be beneficial to program performance."
IMO - they cost the same over at amazon.co.uk but on US sites (newegg) they are cheaper. Thus the recommendation. The same goes for the CPU cooler - Hyper 212+ since it has the best bang for buck.
Personally i use/prefer OCZ but the same will be for Corsair, they are a tad bit expensive but they are bleeding fast!