I prefer 147 gr.
Assuming the round functions 100% in your gun the 147 will offer more penetration which is the 2nd most important thing in defense ammo IMHO.
Also 147 loses less velocity from a shorter barrel than a 124gr. will.
I carry a Kahr P9 and use Federal 147 HST or Winchester Ranger T 147gr.
If I were going to carry a lighter round it would be the 115+p Corbon DPX