I have all three http://smg.photobucket.com/user/Airs...l?sort=6&o=121 in my collection and consider the '65 by far the best. O.K. so it doesn't have an adjustable trigger, perhaps I am just lucky it fits me. The '90 can be a gamble. I have heard some have a delay on pulling the trigger. You cant go far wrong with a nice '65.

HTH
Ian