I considered the Cadet, friend has one in .357 Magnum and it is neat. The action is genius. However, the Martini-Henry rifles are to my mind's eye UGLY.
I have in mind a certain shape, sort of Gibbs/Farquharsen, Martin Hagn, or Ruger #1 shape with internal hammer, tang safety, long pistol grip with cap, slab sides, and hidden fasteners and pins.