Jason, I believe I comprehend the goals of you project. I am thinking of it as performance art.
My suggestion is powered QSC speakers. 4 KW181 and 4 KW153.
This will give you a high quality high reliability , efficient system, capable of rock levels at indoor venues.
Of course if you push it too hard it will blow the single 20A breaker.... but the same will be pretty much true for whatever you get provided it can produce enough sound to keep up with the drummers.
The key here is the 4 subs will provide a stable bass for the tops. The 4 tops are arrayable (75 degrees each).
Current prices are about $1400 per speaker.