My first one would be a 450 / 400 if I can afford it. The most likely one could be a 470 Manton as it is sitting under the bed of my dad's friend & waiting for me!!!

If I ever get a third one, it would be a 360NE or a 9.3 or 375 Flanged NE.

If I owned a double rifle manufacturing business, I would focus on these four (excluding the 360, as that is just my personal prejudice & not really popular now) plus a common 450 & a common 500.

I can dream can't I!