Wanting a Bidet for my Thedford toilet.

Personal preference. The upside of a bidet is that you'll use less paper and more water which is better for your black tank and the environment. The downside is that it will use more water which will drain your FW and fill your black quicker. Not an issue with FHU. You can always shut it off when boondocking. I am sure any aftermarket, bolt on model will work.