If I had $1500, and could only use it on a pistol, it would NOT be a 9mm.
I'm curious, why?
I'd probably go with Glock 19 & Glock 26, or 2 19's, and mags, ammo, holster(s). Redundancy at all levels, and standardized.
Now, that would be my choice, but I already have that covered.
A good question was raised above, what purpose are you looking to fulfill?