Making an ammo decision depends on how you intend on using your weapon. In my case, my M&P40c is used as my EDC. I was advised, from a legal perspective, to always use what local law enforcement uses (to avoid the claim I was using inappropriate ammo). I thought that was good advice. Therefore, for personal protection, I use Speer Gold Dot Hollow Point (GDHP), 180 grain (same as Las Vegas Metro). For target practice I use Speer's Lawman (TMJ, 180 grain).
My wife prefers 9mm. For her, I bought Speer GDHP 9mm 124 grain and the Lawman version for target practice.
We purchase ammo via the internet. Prices are good and delivery is 3 days max.
I hope this helps!
Marcus