I have the Shen Hao you are considering, it is an excellent camera, I have used the model prior to the current Chamonix camera once alongside my Shen Hao.
There are slight differences and on paper, the Chamonix is the better camera. The Shen Hao has rear shift, whereas the Chamonix has its shift on the front. One has more rise on this standard and so on...........
The reality is they will both do virtually anything you could imagine in the field, and, within reason, the are both pretty good at architectural photography.
I regularly use a 65mm on my Shen Hao, it will work with the standard bellows, they are fairly scrunched up, but they do the job easily. The reason they work is because you have almost no possible movements with a 65mm lens as it just covers the 4x5" format. I have a bag bellows for my Shen Hao and use them whenever I use my 90mm or anything smaller, the bag bellows certainly makes life easier. Using bag bellows with the 90mm means I can utilise the extreme coverage of that lens without forcing the standard bellows into positions where it could lead to damage or a premature life expectancy.
The Chamonix would certainly be on my very short shopping list if I needed to replace my Shen Hao HZX45-IIA.
The focusing is easier to use on the Chamonix, sort of. Either camera can focus perfectly, but the later design of the Chamonix where the focusing screw is at the rear under the dark cloth (if you use one) is certainly a big difference.
With standard bellows the Chamonix is able to manage a longer focal length lens. Not by much but it certainly is longer and is able to handle a slightly shorter focal length.
What the Shen Hao does have, is detents which centre and home things. That said, I am comparing the previous model, not so sure about the current offering.
I would suggest you look for a second hand unit of either one and get into large format that way. You really need to use a LF camera for a while to understand the system, height to width of the format and how the different focal lengths work. Changing cameras later, either to acquire a new or second hand camera of your choice, means you can keep all of your lenses and just start using the new camera. It is reasonably possible that you could sell your first second hand camera for close to what you paid.
Mick.