If you want to go traditional then Lyman has good rifles. The Great Plains is a tack driver and I've been thinking about getting a Hunter barrel (1 in 32" twist for conical bullets) for it to go a long with the roundball barrel. Now the GP may be a bit long for you, but they have a shorter rifle called the Deerstalker that shoots really well.
For both traditional and modern Thompson/Center has some very good rifles (even the Encore has a blackpowder barrel). I have a Black Diamond XR that is a very good shooter.
Like any other firearm remember to try different bullet designs and powder to find what yours like. Don't expect to drive tacks out the box. The bore needs to be seasoned first.