I currently carry a Khar CW45. I have 2 issues with it. Most important is that the slide stop spring has a habit of loosening up over time. This allows the stop to move the left, causing ejection problems. The other issue is the small capacity. I would prefer a double stack magazine over my current practice of carrying an extra magazine IWB.
I want double action. Could be hidden or exposed hammer.
I am not really concerned with the butt length or width. I always carry IWB, so the barrel/slide length is what dictates comfort for me.
I use CrossBreed Supertucks. Love em on my old S&W 1st Gen and on the Khar.
From a functionality aspect, I think the perfect pistol would be a Ruger SR45c. Sadly, they don't make one. My girlfriend carries the SR9c. That pistol is an absolute joy to shoot. It has the smoothest, lightest double action trigger I have ever experienced.
So, think short barrel/slide. 4" or under with at least 10 rounds in the mag, a really sweet trigger, reliable, etc.
A quick search shows me the Taurus Millennium series and the XDm Compact falling into those parameters.
Please help, advise, chastise and otherwise inform this grasshopper.