Holy crap! I've been recently hearing bad stuff about the Frams and stopped using them this year(Duc always got oem). Bet they have a large marketshare due to superior advertising, not superior product. Much like Crudweiser beer. I think I just threw up in my mouth a little :-X.
I switch around between OEM, K&N, and a while back some Perf-Form f;ilters. Those three are probably the tops in quality.
I recently bought a bunch of Perf-form filter cartridges for the BMW because it was more convenient than riding over to the dealer in Orlando. Likewise I bought several K&Ns for the Ducatis back in the summer because it was convenient to get them from one of our regular vendors at the track, who also gives us Staff guys a little break on the price. So among the top quality brands, it pretty much comes down to convenience/price for me.