So 2 sticks of 4GB, not 4 sticks because it only duel channel? but I have to ask why is there 4 dim slots?
Also I chosen one of these it just down to colour!
http://www.scan.co.uk/products/8gb-(2x4gb)-corsair-ddr3-vengeance-jet-black-pc3-12800-(1600)-non-ecc-cas-9-9-9-24-xmp-150v
http://www.scan.co.uk/products/8gb-(2x4gb)-corsair-ddr3-vengeance-racing-red-pc3-12800-(1600)-non-ecc-cas-9-9-9-24-xmp-15v