Les Baer
Ed Brown
Wilson Combat
Nighthawk
...? On the 5th...
If you are looking for best quality for your dollar then Les Baer. In my opinion you are paying for aesthetics with the others. I prefer Brown and Wilson's aesthetics. Love my Baer.
Dan Wesson would be a great fifth.
Sig Sauer, Springer, and Colt are def great mid line pieces as well.