To follow on Oshawapilot's questions:
None of my 4 horses refused the boots. The first steps are sometimes funny-looking as they step high, but very quickly adapt. And a foot sore horse will likely move better in boots when he realizes some of the pain's gone.
As for which kind, I second Loosie. The Easyboot site has a suggestion of models based on miles per week, type of riding, ease of use and traction. The shape of the hoof is important, all models might not fit. With your riding, I'd look into the Trails or Epic. Epic is more tricky to install, but more forgiving in terms of fit than the Glove.
If you consider outside EasyBoot, Renegades would be a good option. Every company has its measuring charts, fairly easy to do.
Good luck on the boot hunt and let us know how it goes.