FWIW, I have been told similar things about RF. I was told by an installer that one of RF's main amp designers left to work for MTX because RF's quality have been going down for the last couple of years. Of course, the installer was trying to sell me on an MTX, so take that for what it is worth.

Also, most people tend to think of RF amps as being decent at driving subs, but not having the best sound quality for driving the rest of your speakers.

-Mike