Scott, I think I have heard this from Dave --
With two JBL10's, if you want more add a sub-woofer. Feed the JBL's a little more trebble and the sub does the rest.
For a large job, 200 and up, I use stands for the JBL's, the sound carries futher above the heads, a little volume goes a lomg ey. And a JBL Ge2 for the bottom. I feel a sub would do a better job than the Ge2.

IMHO, John C. --- I'm drowning down here in Florida. How about you Scott?