I would second the Pentax 67 if you want a SLR. Most of the lenses are very sharp, but the EDif lenses are very expensive. On top of that you can shoot 67 lenses on a Pentax 645 or any 35mm camera that will take a M42 adapter.

If you are going to hike with MF I would go for a mamiya 6 (late) or Mamiya 7.