I Recently did a new build with water cooling in mind, in hindsight I probably should have gotten a more roomy case. I am looking into setting up a custom loop to cool a overclocked gtx 670 and i5 3570k. The real problem at this time is my case, the Rosewill Blackhawk mid tower, it would need a slim 240 rad on the top with 15mm thickness 120mm fans which really wont provide much airflow. Another option would be to configure a push pull as i could mount fans if i removed the top plastic shield, but both fans on each side would have to be slim, probably would have to go with scythes in a push pull config.
Another idea was to have a very thick single 120mm rad with a push pull while only mildly overclocking the cpu and gpu. Any thoughts or suggestions are greatly appreciated.
External rad=Good idea and I fully approve
Calculate your radspace using the info in Rubix' sticky, (links in his Sig)
another option you have is an external radbox, keeps the case clean and neat-looking