If I may add to some of the questions that Dean mentioned re. Pro Amps specs. What is considered to be a desirable slew rate vs a poor one, is a lower/higher number better/worse?

I've been checking out a number of Pro Amps and I'm starting to believe that many of them are coming out of a single(huge) factory in China as they are virtually the same except for the face plates, including some of the "expensive" ones.

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