Last count I had about 6 smoke poles in the house. .45 long hunters, .50 hawkens, 12 gauge dubbil burril, and my favorite: an inline. It's the T/C Scout. I think it was T/C's first inline. It looks and handles like a big .30-30 (okay, maybe Marlin 1895 .45-70). She's reasonably accurate, and has a cheapie 4x scope on board. I absolutely love her.
I had one of them CVA Optima's in .45, won it in an auction. I never loaded it, I sold it. I'd heard bad rumors about their steel quality.
I had a T/C Encore with several barrels, including 209x50. In a moment of stupidity, I sold her to buy a 'flavor of the month' gun. It was a disappointment as a rifle, but it was a pretty good muzzle loader, maybe the best I've ever owned.
I've never had my hands on an underhammer, but they are way traditional for sure. Neat stuff!