If a horse can go barefoot it is better for the hoof no doubt. But alot of horses can not go without shoes. I had my horse without shoes for about 12 monthes? As training increased and differing conditions it became clear she needed shoes. When she got shoes she was so much happier moved better. Wasn't afraid to walk on gravel or any kind of hard surface.
And this is not barefoot vs. shoes thread this is about this particular horse.
If anybody would like to debate this issue you could create a new thread! Which I'm sure alot people would comment on.
To the OP, if he's fine and landing heel first without shoes, boots or any other device, then the x-ray was probably showing old damage, and you can most likely save yourself the money you would spend, and congratulate yourself for having a good trimmer/farrier who is balancing the foot right. You could put that money toward a second opinon. If your horse is moving sound, why was the vet looking for Navicular? Or did I miss that? *shrug* If he's a little gimpy on certain surfaces, you can always use boots for that situation and maintain the benefits of being barefoot, and work toward developing the hoof so the boots can be weaned off later.