Which Amp Where?

I have the Paradigm (11skm)? towers for mains and the CC-300 for the center and ADP-450 for surrounds. I use the Yamaha DSP-3090 with DTS upgrade for Preamp. I have the following Yamaha 2 channel amps....M-60(150wpc) running the highs and mids on main speakers, the MX-830(150wpc) running the low end on the mains, the M-70(200wpc) "L" channel running the high on the center channel and the "R" channel running the lows on the center channel. I use the M-4(125wpc) for the rear surrounds. QUESTION: Is there a better amp set-up I could be using? The M-60 has that class "A" thing so I thought that it would be good for highs and mids on the mains, also, the MX-830 has never even hinted at the protection lights no matter how hard I drive the mains, whereas the M-70 has those peak meters and they are "pegged" when I drive the mains. It seems that is not good for the amp, I don't know. ALL opinions welcome. Some of the members here are more familiar with these amps than I am, so feel free to let me know. Thanks Jack