I've heard good things about Lone Wolf over on GlockTalk.com. They actually have an employee that works at Lone Wolf on the forums there.
I've never tried any of their barrels, but when I get the spare cash, I intend on picking up a threaded .40 barrel for my G27 so that I can use muzzle attachments.
Your assessment of the Glock family is dead-on for reliability. Just check this out:
Glock 21 Torture Test - Theprepared.com