I'm with Don, Barbetta 31c. I use the Bose PAS with bass bin as much as I can. But for smaller venues and gigs less than two hours, it's the Barbetta. Also, for large venues that insist that I use the house system, I have two 31c's that I chain since the PAS doesn't have a line out. The PAS, IMHO is still one of the best systems for OMB with vocals.
Ciao,
Jerry