Which caliber should I choose.

[The_woodsman]

I currently own a .45 Kimber and a .22 buckmark. I am going to replace the kimber with a EAA witness p-carry model instead. The beauty of the Witness series is that these new guns have light rails (which I prefer) and have the ability to change chambering by simply changing the slide/bbl/mag, an option that the 1911 model is quite limited (especially a double stack like mine).

So, I have some options here in the "stock" chambered model to choose from.

They come in the following configurations:

Caliber: Capacity:

10mm 15 + 1
.40 S&W 15 + 1
.45 10 + 1
9mm 18 + 1

In addition, I can purchase a .22Lr and .38 super conversion kit for these units, although the .38 super will be a longer barrel/slide than the stock one.

Which one should I choose as the "stock" pistol caliber?