Originally Posted by BudW
.40 cal. I live out of town
There are many great options, so it's just about you playing around and figuring out which you like best.
For 40sw in particular, choosing a weight is probably a bigger issue than what brand you prefer. Some feel bigger is always better, and they'll always choose the 180gr rounds. Others like the faster 155-165gr weights. And there's also plenty of evidence that the 135-140gr loads are among the best defensive rounds, having ballistics similar to a 357sig.
All of these weights are fine defensive options. Pretty much every major manufacturer makes a quality defense round. It's really just about doing a little of your own hands-on research to figure out what fits you and your gun best.
This is where I order my defense ammo.