If I were you, I'd get an F-line Classic, unless most of your work would be multi-day backpacking. The ARCA is a joy to use, and it packs down really small. It's not as sturdy as a Linhof Technika 2000, but it's easier to use and has more movements. If I remember correctly, you can get an ARCA with Orbix, which gives asymmetric tilts. Once you use them, you won't want to use other types.
I used to have a Toho 45CR-X (approximately 3 lbs.) because I thought that I'd occasionally go on back packing trips, and I did. But the camera was not that fun to use. I sold the Toho and bought a Sinar P, and two Fuji medium format rangefinders, and I don't regret it the least. I can easily go a mile or so with the Sinar 8x10, and for overnight trips I take the Fujis. The ARCA would be more of a do everything camera than my Sinar.
One other thing to consider would be an Ebony with asymmetric tilts. This would favor the longer hikes, while still being a very capable camera in the studio or near the car.