So I'm getting ready to go buy a new subcompact and I'm stuck on what caliber I want. I already own a 9mm and a 40sw. I am leaning towards another 9 or 40 but the others aren't out of the question. So tell me which to buy and why. I'm looking more for magazine options and availability as well as known problems with a subcompact in a particular caliber. I don't want a 9mm, 357sig, 40, 45, 10mm debate. Just what opinions on the guns themselves. Thanks ahead of time.