43X - perfect balance of size, capacity, and quality. I like bigger cartridges too, but I also like having a pistol that I’m comfortable carrying (IWB) all 4 seasons in any situation (t-shirt/shorts is no problem). I can keep it on my hip all day - driving, sitting, whatever. Whatever you choose, if it’s not comfortable AND works for you to put rounds ONLY where you want them, then it’s a bad carry gun (for you). Quality wise, I have several Glocks with thousands of rounds through them - excellent pistols that I trust my and my family’s lives against humans and dangerous wildlife. I’ll probably never carry any other company’s pistol (not to say there aren’t many great companies out there).