And this one:
and Google Don Tsiklonaut.
He uses a Pentax 6x7 with several lenses for recording the sights on his motorcycle tour around the world.
(You gotta say that anything that can survive what he put this camera through has to be tough)
Also, check out the threads on the Photo.net Medium Format-Pentax 6x7 forum (dozens of pages) from real users.
FWIW, I was in your situation, very recently, and I decided on an SLR setup for the same reasons as I prefer 35mm SLR to 35mm RF: more versatile and more adaptible .