Hi Painttoad,
The reason I don't agree is that my home theatre is already a combination of using a home theatre AVR and separate component amps. So in my case I'm using the separate amps to power my front main speakers (bridged mono), my side surround speakers, and my rear surround speakers.
The home theatre AVR amp section is used, but it is only connected to my front center channel. The main reason I have the separate amps is that I want the dynamic power available to my speakers for the transient peaks in loud movie scenes. Does it mean the SQ is automatically better, not necessarily. It is the same reason why my front speakers have dedicated built-in power amps for the subwoofers, does it sound better then using the AVR amplifier for the subs? Maybe or maybe not.
If I didn't have the separate amps and only used the AVR to power all channels then the transient peaks would sound different, but I wouldn't say the SQ is automatically better. In my ears, the two areas that affect the SQ the most are the input source and the speakers. The components in the audio path should have the least amount of influence, especially as you go up the ladder in terms of quality. I guess my ears are just too old to hear the differences if they exist....
So to me the components like pre-amps, amps, etc. have a lesser impact then the speaker and the sources. Components like TT, DAC, CD/DVD/SACD player, speakers, subwoofers, etc. are where I tend to spend most of my money. I think as long as the pre-amp, receiver, AVR, main amps are of decent quality then they are lesser of a concern.