I'm seeing the Cougar fans suggested often as radiator fans, and they are quite often on sale, like here:
http://www.ncix.com/produ...%20Deals&promoid=1016
Any hope of including these in part 2? Also, can you pick a handful of standout models and see how they compare in actual use? One set of tests on a air cooler and one on a water cooler? It would be interesting to see if these airflow test standings hold up in real life, which is hopefully the case.