Some great choices out there..
...
Have had a Beretta full size Px4 40 G (decocker-only) w/rotating barrel, polymer frame, large round capacity and can't say enough good things about it over 5yrs, 11k flawless rounds, accuracy never fails, very soft/balanced, and rail mounted laser has not changed in 4yrs since I put it on and dialed it in for a six o:clock sight picture just off/above the front sight.. Spot on whether up close or out to 63ft max at my indoor range.
Very nice, smooth DA pull and clean SA break, out of the NIB, which both just get better and better with use..
Mine next to my Sig P228 9mm
Also, I have Two P229n/r 40's (also decocker-only) that between both of them, thru 4yrs, I have nearly 14K flawless rounds and a tad heavier than the Px4 40 but the thicker slide/weight offers nearly the same soft, balanced, recoil along with quick follow up shots with on-going accuracy that just never fails.. great gun as well.
Note: P228n/r 9mm same size as P229n/r 40
Both of my P229n/r 40's , one with CTC laser grips, once set, 3yrs ago, never changes as where the red dot is, so go the bullet/s
Both, make/model, guns are the easiest guns to dissemble, inspect, clean, and reassemble, out there, bar none.. Makes for fast, easy, fun, inspections/cleanings.
Both types just a pure joy to own and shoot and I "know" they will keep on firing, be it 2-hand grip, 1-hand grip, weak hand grip, they don't fail, never have in mentioned years and round counts with both type ammo's new or reloads, with exception to a bad bullet here and there, now and then.
If you want a slightly bigger gun, then a Sig P226 would be a great flavor to choose..
New ammo's of most makes or reloads (of good and known re-loader/company) run fine thru both makes
Luck,
Ls