Most talk about clipping, crackling, insufficient volume etc. All these things strongly point to basic amplification shortfalls
I've been on this forum for a long time. I do not see MOST AVR users on this forum having clipping issues.
A few have mentioned Crackling (on Center Channel),which could very well be their speakers. Can't blame that solely on AVR.
Insufficient volume means that have to turn that master volume knob up. NOT an indication of lacking power. Again, all they have to do is increase the trim levels (speaker channel levels) and they will never have to set the master volume more than -20.0. Then it's like magic and everything sounds great. I've seen it too many times.
Anyway, there are too many threads already on AVR vs. Separates. So I will leave this alone.
Sure, nothing wrong with owning separates vs AVR. I have always used separates for my main HT system.
But like others have said, it seems a bit funny to own $5,000+ separates electronics (the 5Ch ATI amp retails $3300 alone) and speaker system that costs less than $2,000. Still nothing WRONG, but just not the usual recommendation.
Now if the speaker system were $5,000 - $10,000, then I say hells yes let's get some separates, bro! Although it's absolutely okay to use a Yamaha RX-A3080 for a $10,000 speaker system too.
If going separates, he could probably get a new Adcom 200x5Ch amp for around $1500. Monoprice 200x5 amp also.