I noticed no one has suggested a Para LDA.
I prefer a DOA or Glock Safe Action for carry. I bought a Taurus 605C as a carry gun, and I really like it, but I find that I almost always shoot it single action at the range. I know I should practice shooting double action because that's how I'd need to use it in a pinch, but I can't shoot it worth a dang double action. I'm thinking about picking up another carry gun, and two of the guns I've been considering are the Glock 36 (I've shot one and like it quite a lot, and I already own a G21) or the Para Carry.
But I might not go with a .45. With +p ammo, a 9mm or even a .38 are pretty potent weapons.