Hi,i am due to upgrade my pc,i am buying a Core i5 2550 and intend to OC it,now i have been looking at two cooling solutions,the Corsair H80 which is a self contained Water cooling system which you never need to clean(according to a YouTube video) or the Corsair A70 air cooled solution. Having never had the water cooling before i just wondered basically which is best. Any advice would be very much appriciated.