You ask for pro/cons, and thoughts- here are some of mine.
If all you want to do is pull the trigger once a year and store the gun dirty like most of the in-liner crowd, then go with the smokeless savage. Simply put, it will go bang reliably and last forever.
Personally, I'd put my opensighted sidelock T/C Hawken shooting real blackpowder and patched roundballs up against any of the so-called magnum/scoped/sabot shooting in-lines.
My Hawken has embarrased more than a few of the in-line users at the range, and it never fails to fire providing I do my part.
If you must have an in-line (though I can't think of a reason why over sidelock) then also look at the Thompson/Center Omega.