LA Woman is the one for me, it is hearty and hard as hell to kill, the end product is very nice and harvest time can really change the effects(all good), clones well also, I have it in every rotation.
I think the max CFM your going to get out of a 120mm is from this one
http://www.newegg.com/Product/Product.aspx?Item=N82E16835706023
RPM: 6000 RPMAir Flow: 210.38 CFMNoise Level: 64 dBAThe DBA level is a little steep though and for 36 bucks you could spend a bit more and get this...
I have one ding the same thing, itI am 18weeks into flower and the trichs are almost nill... the seed was from a batch of seeds my dad found in his closet that guesses was at least 20 years old.... we germed all of them (a film canaster full) it is the only one that grew.