How much do you want to spend? If money is no object, you aren't going to beat the Encore. I don't care what anyone says.
If money's tight, you can get an Optima Elite with a couple of extra barrels for the same price as an Encore with 1 barrel. I've seen blued OE in 45-70 for as little as $225 brand new. New factory Encore barrels usually cost at least that much, if not more. Something to consider.
Haven't seen the Knight yet, I want to, but no one around here's got one, and I haven't seen enough feedback one way or the other to break down and order one. It seems that you either love it or hate it, no in-between on it.