A 7x17 camera isn't that much larger than 8x10. So it's pretty easy to carry. I'm looking for 8x10 resolving power, but with more of a landscape view. 7x17 uses a lot of lenses that are covered by 11x14 as well. Once you take the next jump to 8x20, the choices are fewer. I guess 4x10 is also an option, but that's closer to 4x5 and 5x7 resolving power.
Thanks for taking the time to read up, Dr Croubie!
Why not get one of those split backs, and shoot an 11x14 with it cut so 5.5x14 (or whatever it is split.