I've used the Easyboot Epics, Bares, and Gloves - we sell all the boots incl. Boas, Cavallo, Old Macs, etc at the store I work at, we actually ship boots all over western Canada.
We get the most positive Feedback from the Gloves, but it depends on your trim too - if you follow the natural hoof trimming ideas, and trim regularly, the Gloves will never let you down, they are lightweight, close fitting, and no irritating buckles.
Epics or Boas are good if you don't have a consistant hoof shape, they do work well for flatter riding, but I find in the really hilly/rocky/shale areas around here they aren't as good as the bares or gloves for grip.
Looks like the easyboot is still the way to go!
I have used them in the past and thought I would ask around about the others boots before purchasing another pair for my new horse!