As for horn loading, it's a great way to go, particularly for the frequency range you want to cover. But it does make the cabinet larger, and if you're playing clubs, you may find basshorns to be a bit much to carry alone. Some of my musician friends like bigger cabinets, and some don't. I suppose a lot depends on where you play and how you like to setup.

This is a good discussion for the Musical Instrument Speakers forum.