Ive looked at the Tc site and still are having trouble deciding.. has anyone tested or tried out different cfm fans on pa's? I have low cfm yates on mine currently and even though they do an "ok" job, Im not happy with them. Before I start buying a bajillion different fans to try out.. what is the sweet spot for these rads (noise vs performance). It will be 4 fans on 2 rads I cant fit them in push pull config in this case.