This might be opinion rather than fact. The amps in the Pioneer Elites are what they are all about. They are amazingly strong for receiver amps. I've heard them drive 4 ohm speakers loud without even getting warm.
Of course it's an opinion, that's what he asked for. The Elite series is a standout from Pioneer, just like Sony ES, Integra, NAD Master, etc. I have no argument with you in that fact and never stated they couldn't run a 4ohm load. I've owned alot of vintage and modern gear and NAD has always produced a very nice power section from my perspective, way back to the 2200PE('86 for example).
The last Pioneer gear that stands out to me is the SPEC series from the 70's and naturally some other pieces but when the HT revolution started.....the silver age flame went out. My buddy Rick has a silver Pioneer sickness and it's beautiful

The black fascia killed audio during that time and it was directly reflected in the guts and cost effective circuit design. I'd buy an older silver age piece of gear quicker than I would MANY pieces from the mid-80's to the mid-90's from the heavyweights of Japan.
Fast forward, Pioneer invents the Elite series to compete with a higher end product and have a statement line of electronics. Awesome! I dig it, I've heard it and I'm just stating my opinion.
Viva la KLH!
Mark