I'm currently using the Cooler Master Hyper 212 EVO but i can't use ram with a heat sink due to it hover to close to the socket.
Its fine with the ballistix sport but i want to upgrade the amount of memory in my system and while not completely necessary the heat sink would be a nice precaution and feature to have with it.
I'd recommend all closed loop liquid cooling. From Corsair to Enermax. They are not that expensive no more, take little to no space, easy to install, and better than most conventional coolers.