Gene..
U are absolutely correct...
The 5805 was 1 killer AVR...
Many years back I was at the Lucas THX testing labs in San Refael, CA getting THX-Ultra certification for another major audio brand's AVR.. And the Denon AVR 5805 development team from Japan was there, I spent several hours with them discussing high-end AVRs and THX. I was totally blown away on how knowledgeable and innovative they were. In those days the THX team (Holman, Dahl, Mansfield) were laying out specs and features that few other AVR guys were even talking about.
IMHO @ that time the 5805 was clearly leading the industry...
Just my $0.02...