Public address for a venue is totally different than filling it with decent volume, flat frequency spectrum music.

Simply talking to a 1500 seat room, a pair of K8's would be more than enough. The horns have a pretty good dispersion pattern, and the sound is pretty even across the field. Put me down as a fan of the QSC K series. Used them in various capacities a few times, hell of a loud bang for the buck, clean as a whistle.

Not a cheap whistle, but what'a you want for free... a rubber biscuit?!