The shop is 48Wx72Lx17H. I'd like to hear stuff like ZZ Top at live listening levels.That's almost 59,000 cubic feet. Contrast that with what most of us are familair with: An 18x20 family room with 8' ceiling is 2,880 cubic feet. Even a fairly large "great room" in a spacious upscale house would be around 12,000 cubic feet.
There's a lot of air to move in a room that big.
For live levels in a venue like this, we have to think in terms of something close to a full-range PA speaker. The Klipsch is sort of like that, and so is a 2- or 3-pair array of Cerwin-Vega CLS-215s.
Another viable option might be full-range self-powered PA monitors, maybe something like this.