I've never done any direct A/B comparisons for mains with the INuke (class D) vs. a traditional A/B or class H amp like the Crown, Emotiva, or EP4000. However there is some suggestion that the Class D amps cannot produce higher frequencies very well because the switching powersupply cannot switch fast enough to keep up with the top audible frequencies. I have a laymen's understanding of the tech so I'm not the right guy to go with for extra questions, but suffice to say most 'audiophiles' would say don't do class D for full spectrum audio listening. Class D is fine for subwoofers -- very efficient and clean, but there are some would would say stick to the more traditional "iron amps" for true discerning listening sessions. With that in mind - I ran a pair of Noesis to reference music levels on a T amp which puts out 20 watts per channel, and it sounded great. I agree that's it's hard to swallow spending $3 - $6K on speakers and then running them on an AVR with no amps. It's almost like I NEED to be thinking about running an expensive amp to compliment these expensive speakers --- whether you do actually need to or not would be an interesting subject for a blind listening test with a dozen AVSforum members.
I'll likely try to do that someday.
Put up an AVR's internal amp against a Crown XLS against an Emotiva -- maybe throw in my Inuke for good measure, and listen to a half dozen songs and move clips and see if anybody knows what's what? I've read that having lots of extra headroom can amount to better midbass and such --- it'd be fun to find out.
I'm neutral here --- no real expectation --- except that these JTR speakers can be driven with EXCEPTIONALLY little power in a typical home theater environment, and if an amp introduces noise or hiss - you are probably better of just letting your AVR's amp handle the goods at typical listening levels.
Heck, BlueSprings1 was playing at 15+ dB over Reference volume at his house on his JTR Triple Eights last time I was over there and they sounded great on just a Denon 4311 --- no external amp. How often you need to go to 15dB over reference I'll leave up to you.
Sounded great OUTSIDE the house.
Cause inside it was ear piercing LOUD.
That said --- i'd probably at LEAST want to try a high powered amp on the JTR equipment myself.