If you have a crap ton of glock mags... the Keltec might not be a bad option. They make a version that takes Glock mags.
I'm not sure how they shoot or how they perform though
My RRA has been 100% since the day I got it. It is a dedicated 9mm, so there is no switching uppers on this one, which is a drawback for some people.
I know the Beretta CX4 has been discussed here from time to time and was on your list. I have one and it is a terrific shooter. I love about everything about it. Ease of use, low recoil, ease of cleaning, truly ambidextrous (even easily swapped back and forth in a matter of seconds), repeatable performance, excellent finish...on and on...
The only major con is the price compared to some of the others and limited (and also high priced) accessories.
Mine would be one of the last firearms I traded or sold if it came to that...