Since you are comfortable, competent and qualified with the Beretta go with that.
The Beretta like the Glock needs very little maintenance to keep running, so having an armorer around just in case for either platform should be a non issue.
If it were me, I'd go with the lighter of the 2 guns.
CZ 75 P-01 . CZ-75B . CZ 912 . CZ 920 . Glock 26 Gen 3 . Kimber Pro Crimson Carry . XDm 45 3.8 Compact . Ruger 22/45 MKIII