Hugh, I'm running at 500 watts. It is absurdly loud. I do think it is enough for any situation. A load of punch, lows and highs. And if you need more, just use the stage's PA.
I'll be using it on a concert in October for an expected audience of more than 60.000. I'll put it through the mix to deliever the sound on the back speakers, but for the main audience, they will definetly hear me.
For a comparisson, I was using an Ampeg SVT II with a 4x10 and a 1x15, and this portable, beautiful yellow rig kicks it's a** hands down.
Raymond, I swear I can't imagine how loud you can be with your rig! I'm really glad I'm not your neighbor!
Greg