XD .40 only because my Kimbers are rather large, heavy and a bit unwieldy.
That said, I carry my Kimber in a briefcase and occasionally holster it in the small of my back.
I luv muh Kimber.
She’s such a babe.
I used to love my XDm .40, before my boating accident, that is but it was a bit too big to carry so I would consider the compact version. My old mags would have fit too, if I still had any of them ;-) Once my budget loosens up there might be a rig in my future.