Gentlemen, I am gathering up parts to build an amp with two 3-500's and before I get a blower I was wondering which was the best one to get or if I can't find one of those what is the 2nd best? Larry L. Ravlin AA7LR EX KØAEY & KD7BXR aa7lr at msn.com Extra class @ 20WPM FISTS #12867