Rolex, my friend, you are a human database when it comes to weapons. I read the article on the Stoeger, and I'm impressed. It's definitely a top contender. The old Cougars were able to accept 15-round mags from the M9s; maybe this will, too. I like the Sig and the Glock, but that $300 difference will like be a decisive factor in which one I choose.
The thing I like about the Glock so far is it`s ability to use higher-capacity mags as backups. I wouldn't mind carrying the 19 with its stock magazine, but having a G17 or G18 magazine as a back-up. That would certainly last a while in a firefight (read, until the cops arrive).
The Stoeger article mentioned a design called "truncated metal jacket". What is that, and how does it compare with JHP?