As soon as I put my full size M&P .40 in my hand, and felt the grip and grip angle ,...(I knew that was it.).
When BHO was elected,

I bought my first full size 9mm the day after the election, and the FNP-9 form and action, (I knew that was it).
I bought my G21, because it was a steal with 500rds. of ammo, and 4 high cap mags...BUT, .Grips are slightly too big, it's a railroad tie with trigger, but it goes bang every darn time with all ammo (even wolf).

Your choices thus far are Beretta and the "G"...
Beretta is Beretta. Time tested, battle proven. (I would opt for the .40 instead of 9mm), IMHO, but a great pistol.
So,......since the G22 is your other option....with the Gen. 4 grip options,
(copied M&P) 
you may just have a winner.
Mags and parts, and action upgrades are easily obtained, and there are enough LE Depts. with G22's that swear by them.
Apply the K.I.S.S. Methodology.....The right one may just pick you.
Then at some future time buy the other one Grin+1