A 110 XL Super Symmar will give a great deal of coverage, but for me it would definitely be too wide as a first lens.
And there is something nagging in my mind as to whether all that coverage can be used on the Toyo anyway. Somebody with experience of that camera may be able to help more than me. But with a similar camera, an MPP MkVIII, my 90mm Super Angulon need's a cone lens panel (to allow for dropping the bed), but it sat inside the main body at infinity, making movements of any meaningful nature impossible. While you may not need a cone panel I just wondered how close the front standard would be to the main body, and thus how much movement may be possible with a 110XL? If however it is simply the focal length you like thats fine, but I just query if you needed to spend that much on the XL.
P.S. Here is a link to focal length equivalents between 35mm and 4x5