Rotel has the Stereo Integrated Amp for $700 while Denon has the Stereo IA for $1,200. Denon actually has a Stereo IA amp in Japan for $10,000 USD.
Rotel has the flagship Power amp for $2,500 while Denon has the flagship Power amp for $7,000.
Rotel has the flaghips Pre-Pro for $3,000 while Denon has the flagship pre-pro for $7,000.
Rotel has the flagship Receiver for $2,200 while Denon has the flagship receiver for $7,200 (AVR-5805CI) and $5,200 (AVR-5308CI).
Rotel has the flagship DVD player for $1,500 while Denon has the flagship DVD player for $3,800.
B&K has the flagship amp for $2,400.
B&K has a flagship pre-pro for $2,500.
B&K has a flagship receiver for $3,500.
If we are basing on price, I don't see how B&K & Rotel are higher-end than Denon.