Badger has always been considered the premium shave brush. Like it or not that is the way it has always been probably going back to at least the 1700s. Horse was the inexpensive alternative for the masses until the Anthrax scares and then Boar replaced Horse.

Of course like anything else everyone has their own personal preferences and qualities they like. With the Boar or Horse you are more limited to handles and sizes.

Just buy what you like and can afford.