If you want/need pure utility-for-the-buck, then one of the 3 -4" K-frame Smith or Ruger Security Six .357 revolvers will be hard to beat. As Tejon said, there're a lot of them out there in great shape at fire sale prices.
It still gives you the widest spectrum of ammo choice options for recreation or defence of any single weapon. They're extremely rugged and reliable. Accessories and upgrades are cheap and universally available.
There are compact 9x19 choices out the Wazoo. Virtually every manufacturer makes a variation or seven. Go to the next "1500" show in Indy and handle as many different models as you like. Chances are you'll run across something that meets all of your criteria and feels good in your hand.
There are lots of options for 9x19 defensive ammo, from "standard" pressure to +P+. When it comes to practice/plinking ball ammo, no other centerfire is cheaper or more plentiful. It's also the one handgun caliber that you're almost certain to be able to find SOME kind of ammo for anywhere in the world.
I've been carrying an old Star M43 "Firestar" 9x19 as a mild weather "primary" for many years. There are many newer, lighter, "tricker" models now, but I can't seem to part with it. It's been 100% reliable functionally with a wide assortment of ammo, puts an entire seven round magazine of 124 gr. Hydra Shoks into about 3 1/2 - 4" dead-on POA as fast as I can shoot it at 20 yds, and all of the controls work exactly like my beloved 1911's. The extra weight makes it a bit more of a load to carry, but make it extremely easy to shoot well quickly.
9x18 Makarovs and .380s have their adherents. For a bargain-basement CCW, the Bersas and the Maks have some merit. The sights on the Makarovs plain suck: they're tiny, shiney, and really hard to pick-up quickly. That can be remedied, but it's medium expensive and not your kitchen table project. Younger eyes than mine might get away with some enamel on the front blade. I only spent $115 for a like-new Bulgarian a couple of years ago. I didn't find out just how accurate it could be until I had a set of standard-dot XS sights put on it in a fit of extravagance. With Hornady's new HP load, it'd do.
For a rimfire, since you already have a 1911, you can get one of the excellent Ciener .22 conversion units for about $200. Very accurate, reliable, and great fun. Practice with your 1911 for $0.02 per round!
If it's any comfort to you, most of us are in the same boat with you: so many choices; so little cash!