I have 3 .45-70's: Guide Gun, 1895C cowboy rifle, and 1874 Shiloh Sharps, in addition to a .444 Outfitter and 1894 in .44 Magnum. Like was said, I just love shooting the same cartridge Custer used at Little Big Horn, and having the versatility to load it down to pedestrian cowboy load level, or to mid-range for most hunting, or up to rattle-your-teeth T-Rex loads. I have launched 405 Remmie's at over 1900 f.p.s., and that load is not for the faint of heart. Yes, it doesn't shoot like a laser, but the 'cool' factor is way high. And if you load it up with cast bullets for deer hunting, you can eat right up to the hole. Hard cast bullets will shoot through griz from stem to stern. My Guide Gun, like GC's, is tricked out with XS/Ashley Outdoor Ghost ring sights, although my .444 wears a Vari-X III 1.5x5. Get a Guide Gun, reload for it, and you'll be happy for the rest of your life!
I would seriously consider the 1895SBL, which comes already accessorized and tricked out in stainless steel, with a David R. Clay enlarged lever, full-length magazine tube, black and grey laminated pistol-grip stock, and scout scope mount. That's most of the mods people are putting on theirs, with the exception of the Wild West Guns Happy Trigger kit and Bearproof ejector. Marlin says it comes with a 'deluxe' recoil pad, but you might wanna consider either a Limbsaver or a Pachmayr Decelerator recoil pad if the factory pad isn't satisfactory for you.
If you haven't already, you need to go loiter and prowl over at the marlinowners.com website and you will find a wealth of information.
Once you go Marlin big-bore, you never turn back!