A typical small PA system is going to have you dialing in face shredding highs and mud, to make up for the roll offs. Probably some quacking ducks too.
I picked up a pair of Carvin LM-153s with the benefit of a 6 inch midrange driver, which gets rid of the "1k hole" in most two way tops.
I then got lucky with a JBL JRX18s sub, purchased solely by physical size. It fits in and fills in real nice.
I have a Crown X-4000 driving the tops, 1kW each, and a bridged Crest FA-2401 for the sub, around 1200 watts there.
It matches mixes pretty well with what I get from the control room. I'm happy with it.
It's loud. First time I hooked it up with these amps, everything was green and clean, so I... took it to unity.
Scared my roommate right on down the hall and into his room.
That was fun.
With a new dBx 123 crossover, and cables, I have around $2400 in it.
Mobile, the sub goes out with two JBL MRX 515s, and an amp rack with a Crown Xti-4002 and an XLS-2501, bridged. MUCH lighter amps.
I use a Driverack PA2, because for b8gger gigs I swap the single sub out for a pair of Vega Earthquakes, which require swapoing the,amps back and forth, and the Vega's have 6.7 foot horns, so needing delay.
It gets it done, but I have to be careful there as those amps are underpowered for that config.
Once we get back to making money, , a 6002 or 3501 will fix that up.