I have 3 45-70 rifles, and love them.  But I also have a blast with my 500 S&W.  It does recoil, but no worse than a stout 45-70 load.  My handloads with 400 gr. cast bullets over 35 gr. of H110 aren't any more expensive to shoot than a 45-70.  I can truthfully say that they aren't fur friendly however.  I shot a bobcat while deer hunting in Alabama last week, and wound up with about an inch dia. hole on both entry and exit.  Tracking wasn't much of a chore though.  It is pretty accurate, maybe not as much so as the BC, but fun to shoot.  Given a choice between the 2, I pick both!