For the mag capacity restrictions, I'd personally look for a .45 in the compact size for CCW. On a whim, I picked up an HK45 Compact (mine has the threaded barrel, but you can get one without) and it's about the same size as a Glock 19. They have 8 and 10 round magazines, and I have a few aftermarket upgraded 12 round mags (8-rounders are better suited to CCW). All of the features you're looking for as long as you don't mind expensive mags.
I have a couple of FN .45's and the HK45/Compact offer a similar DA/SA, decocker/safety mechanism which I actually like for carry options.
I didn't know how I would like it. I have an older P2000SK that I do like, but I'm not really a huge HK pistol fan. I really like the HK45 compact...
Downside are averagely expensive mags, there are custom holster makers, but not a ton-off the shelf options, HK isn't pro-civilian for customer service, but at least their reputation is good enough to not need it
Non-threaded version...it's actually a good looking handgun as well:
ROCK6