where do u plan on buying the heatsink? im not sure since your over in the uk. the top coolers are the: thermaltake big typhoon scythe ninja zalman 9550 arctic cooler frezzer 64 thermalright si-120,xp-120,si-90,xp-90 any of these would be a good choice, the ninja is what i have and you will also need to buy a fan for it