I've used a single Barbetta Sona 32C with the PSR-3000 a few years ago for smaller crowds and it really worked well. Not as good as the Bose, but adequate for small restaurant gigs. I have a friend who uses the same rig and says it's all he needs. You might want to give this a try.
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)