I only have one 1911, so it's an easy choice. Springfield Armory Ronin 10mm. Just for fun I've tried wearing it around the house. In spite of being almost eight ounces heavier than my other single-action auto (older Browning High Power), I found it was comfortable IWB cross-draw. I'm ambiclumsy, so I practice dry-fire drawing and firing drills with snap-caps and using either hands. While I'll never be a quick draw with my left hand, due to the one-sided safety, it was surprisingly smooth, once I worked out a technique. Right hand is fast, of course. With the exposed hammer, thumb safety, and grip safety, I feel very secure about IWB, especially when reholstering. With two Wilson Combat nine-round mags, plus one in the chamber, that gives me 19 rounds of 10mm. I was seriously considering a four-inch 686+ when I bought this instead. I think it's a better choice for a really versatile handgun. It's certainly a lot flatter! It's been fun renewing my acquaintance with the 1911 after a few decades since I was trained on one in the Navy. My poor Glock 17L is feeling neglected!