9mm=
.380 Auto?
.357 Magnum?
9x18 Makarov?
.357 SIG? <- an awesome round, wish it was more popular
9x19mm is a fine round nowadays. Get some Federal HST or Gold Dots and you're set. I've got a .380, which I think is marginal, but sometimes the situation dictates the carry. I like Buffalo Bore, which may help make up for the loss of velocity with the smaller case.
9x19 Federal HST is loaded in my nightstand pistol and my carry pistol. I practice with it, mostly because its cheap(er). I prefer the lighter recoil in 9mm in polymer guns over 40sw, which means I practice more often, which (hopefully) leads to more proficiency.
Someone should get on designing a cartridge with the price and recoil of 22lr and the stopping power of .45. This whole "making profits" nonsense is for the birds.