well it depends on how much you want to spend really do you want a full custom kit or closed circuit like a corsair H100 i have a h100 and its awesome highly recommend and they have gr8 warranty mines 5 yrs a basic custom kit would be the bigwater range by thermaltake tho i dont know anyone who has used thos mainly custom or the corsair hydro series with a h100 with 4x fans on the 240mm radiator in push & pull config with some arctic silver mx5 paste i have had idle temps as low a 6c hottest its been on a 32c day is 40-43c it works gr8 and thats with 4.419ghz OC