I use a Toyo 45AII, which is the upgraded version of the 45A and the 45AX. If you have a choice between the older 45A and the AX, get the AX. The rotating back is very very nice to have.
For landscapes, I have almost never run out of movements it works very very well. The camera is build like a tank, and has one of the brightest gg I have ever used.
I think you will be very pleased with the AX, but seriously look at the 45AII as well, I like it more, due the the knobs being easier to use in cold weather.
Hope it helps.
Gary