If you like vintage strops, then almost anything made of "shell" that isn't warped, cut up, or hopelessly dried out will be good.

For new strops, the only good brand is Tony Miller. Freakin' awesome.

Well, OK, to be fair, Handamerican strops are good too, but waiting for that website to surface for a split-second and be active is like whale-watching in the off-season.