Thanks to all for your feedback.
The work I mainly do is b&w but have recently gotten into E6 film a bit. I love old grain mills, historic buildings, people & animals in portraits, old vehicles, nature (tree roots, rocks), and some landscape.
I use rather small apertures now, but am getting more and more into shooting with larger apertures. Less f/16, and more f/8 and f/5.6. With MF and LF I'm on a tripod all the time, I don't even leave home without it.
I'm right now leaning towards Mamiya RB or RZ. I don't use the very largest apertures anyway.
Thanks again, everybody.