It seems you had your mind set to a 1911 since the beginning.
I believe there are 6 items on what makes a good carry gun:
a) Reliability: it has to always go bang!
b) Shootability: it has to be comfortable while shooting. This is really subjective to each individual's needs and features (hand size, finger length, etc) and time applied to master the gun.
c) Capacity: more bullets means you won't go out of ammo.
d) Price: hope it won't break the bank and keep in mind it will have holster wear. Are you OK with aesthetically 'ruining' that special Wilson Combat 1911?
e) Easy of maintenance: should be easy to field strip/clean/lub. If is your carry gun, it will start accumulating lint and grime so you better remember to clean it at least in a bi-weekly basis.
f) Safety: the presence of a safety device may be desirable, but a DA/SA design works fine (e.g. Sig Sauer p229) in my view.
I would say that items 'a' and 'c' will make the 1911 drop from the list of candidates (i.e. .45acp is an amazing round but is also 'fatter' and the fact that the 1911 is single stack means less capacity). Also, the 1911 is a venerable design but is over 1 century old and kind finicky compared to the new 'wonder nines' designed many decades later.
One exception to the capacity rule is if you live in a non-free State (i.e. California) and has to live with restricted magazine capacity (i.e. only 10 rounds) then .45acp may be ok with a double stack gun (e.g. HK USP 45 compact).
That being said, modern ammo technology makes 9mm more than capable to stop 2 legged treats.
Glocks are favored for carry guns because it matches 5 out of the 6 items in my view, only missing the mark (pun intended) on 'Shootability'. I personally never got used to the gritty and weird glock trigger.
I personally like Sig Sauers and HKs, they are really well built but fails a bit on the price category (item 'd'), but fulfill all the others (i.e. Reliability, Shootability, Capacity, Maintenance, Safety).
If I had access to any gun as you mentioned, I would consider either the HK P30 on any of its sizes (L, SK, etc) or alternatively the Sig Sauer P229.
For a 1911 lover, they both are hammer based instead of striker like a Glock.
If you are not used to a DA/SA gun, the HKs can be changed to be single action only (LEM trigger) and the Sig Sauer P229 has the Legion SA model (
https://www.sigsauer.com/store/p229-legion-compact-sao.html).
The Sig P229 has 2 advantages over the HK:
a) Better stock trigger: a stock HK trigger is gritty and has some slack. Can be improved with a Match trigger though.
b) Alloy frame: call me old faction, but I like my guns in metal.
The HK has 3 advantages over the Sigs:
a) Safety lever: can be carried cocked and with safety on.
b) Composite frame: is lighter than an alloy frame.
c) Interchangeable backstrap inserts: allows you to adjust the size of the grip.
Whatever you decide to carry, remember to spend time finding a good holster and practicing with the gun + chosen carry ammo in the range.
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