H100 with some good fans in push pull should do you just great. I currently have an h100 as an intake in my CM HAF X CASE with 4 cougar vortex 120mm pwm fans in push/pull config and they are very quiet and pretty great airflow. The h100 cooling my 2700k at 4.8GHZ @1.37 offset voltage keeps my idle temps at the high 20's low 30's and I never break 60C under game load unless it is very hot outside (No AC)
Usually it's actually low 50's or even high 40's!. It's an amazing little CLC cooler, super easy install, comes with pre-applied therm paste which is actually high quality so you don't have to worry about if you applied it improperly. It really is all you need if you just want to do WC on your CPU.
If you wan't to do GPU WC though I would recommend putting together more funds and getting yourself a nice loop with good quality components, it's not hard at all and well worth it if you do it right. If you don't want the hassle of maintenance and the annoyance of draining your loop if you want to install anything that is being WC'd by the loop then stick with a CLC like the h100, very high performance for what it is.Edited by immakulate - 9/15/12 at 1:54pm