Try not to get caught up in the snake oil. Good amps are not difficult to find. Sure, there are crappy amps out there, but the majority of the good brands (Alpine, Kenwood, Pioneer, etc.) all make very good amps that will sound every bit as good as the luxury amps like Brax.Thanks for that! Yes, but good power is still sometimes hard to find. My home speakers are active-crossover with ATI AT524NC class-d amps and they are fantastic. You'd have to get Pass Alephs or something like that to do better. So, I think with the Hypex class-d modules, class-d has gotten as good as or better than class a/b. That being said, there are some real high-end bargains out there in 20-year-old class A and A/B amps. But if class-d is just as good and cheaper and less power required, then hey... why not!
I had a MiniDSP on my home speaker for 6 months. I got rid of it in favor of the ASP because I couldn't stand the treble grain that the DSP added. Just looking at the audio section after the D/A and you could see why it sounded so shrill. I've heard good things about the Helix dsp.3s, so maybe I'll go DSP if it's in the league of Ayre, Chord, PS Audio.
DSPs will be very important, FAR more important than the difference between a Kenwood Ecelon amp and a Brax amp.