I have not yet found my ideal gun but I know what I would like.
I came close with my Hatsan u/o. Just need to go SxS and double triggers with a 1/2" more chamber.

So,12 gauge, SxS, double triggers, side lock, 3 1/2 chambers, ejector, stainless steel, synthetic stock, choked imp mod on both 30" barrels. Proofed for steel & for 3/4 of a ton of TNT. So that I can feed it any factory shell with a 12 written on it & digest any tyrannosaurus load I want to concoct for it.
Give it a good heft to calm the recoil but not too much that it needs a wheel under it.

Please keep in mind that I have lots of other lesser guns to shoot more sensible loads in.
I would just like one that can be taken to the limit.
O.M