You could have a look at "pro" amp such as a Behringer A500(fanless) or one of their more powerful EP or EPX lines(fan cooled), or maybe a QSC GX3/GX5. Pro amps seem to give the best bang for the buck, but I have yet to delve into a separate amp myself, so hopefully someone who has will chime in.

Half of communication is listening. You can't listen with your mouth.