6x9 with 35mm adapter or horizon camera?

I got my Horizon S3 Pro back in 2005 and its still one of my most heavily used cameras. One of the reasons for heavy use that I can get cheap 4x10 prints from a local photographic shop.
It works flawlessly and never had any problems. I've got some custom filters made by William-Jan Markerink including 81B warm tone and infrared.
Some opine that Horizon 202 has a better lens and I chose the S3 for that extra 1 sec. shutter speed. I'm thinking of buying a H202 to judge the lens's sharpness.

6x9 with panoramic adapter is a good option as well. I've seen panoramic adapters available for Fuji 6x9, I guess the preferred choice would be the 65mm version.Any other options for 6x9?
Whereas for 6x6 and 6x7 you can have the greatest choices of lens including the 43mm Mamiya 7. Adapters are available for Pentax 67 as well.
For 6x6, I've seen panoramic adapters for Mamiya 6. However I wouldn't suggest going for the 135W panoramic back for Bronica. The length of negative is shorter than the Horizon