STI Perfect 10.
I believe that this fulfills all
of your criteria.
If the price tag threatens your health, history of high blood pressure or other cardio concerns, then the "bargain" G20 has the "Hi-cap" mags that you are looking for.
And it really depends on just how many you want per mag; Wilson Combat mags for the Colt Delta Elite allow for 9 + 1.
But I'll ask. Why? In a civilian Self defence carry weapon.
For the bears of course! You know, those BIG Alaskan, truck driving bears! (They are getting smarter every day, dontchaknow!)