coolers are not just about cores its designs too, i know pro alloy use the same cores as radtec as there suppliers are the same since pro introduced there 60mm version. Ah redesigned there coolers basically due to the copycatness in the market so obviously i'm biased to say there better as they use better cores and design... IMO i would go Ah plenty of people go radtec as there quite cheap, depends on what you want. i have the old Ah spec cooler and new spec rad and they work great, alex is trying to get some big spec cossie's to use his coolers to prove how good they actually are... i can get discount on ah stuff for people if they contact me i never make anything just about i help them and they give me discounts ...