I really want a Black Ice GTS240 stealth but there seems to be none to buy in the Uk. Does any one have experience with using one of these http://www.alphacool.com/shop/Radiators-heat-exchangers/NexXxoS-Pro-II-Rev-2--4636.html? If so, is it comparable to the stealth? Is two of these in series enough to cool a q6600 and a 8800gts 512?