Not sure who told you that about the 3805 but with 7 channels all being driven, the 3805 can do a true 93 watts at clipping. In 2 channel it can darn near go 140 watts. You are not going to get to much more then that from the B&K's you have listed above.
DOLBY DIGITAL PERFORMANCE (Denon 3805)
Output at clipping (1 kHz, 8 ohms)
1 channel driven..................151 W (21.75 dBW)
2 channels driven..................139 W (21.5 dBW)
5 channels driven.....................107 W (20 dBW)
7 channels driven..................93 W (19.75 dBW)
Distortion at 1 watt
(THD+N, 1 kHz, 8 ohms)........................0.028%
Noise level (A-wtd, 16-bit signal).........–75.9 dB
Excess noise (with sine tone)
16-bit (EN16)...............................................0 dB
Frequency response
20 Hz to 20 kHz +0, –0.26 dB
MULTICHANNEL ANALOG
PERFORMANCE
Distortion (THD+N, 1 kHz, 8 ohms)....0.0075%
Noise level (A-wtd)..............................–89.4 dB
Frequency response
20 Hz to 100 kHz +0, –2.8 dB
BASS MANAGEMENT
Subwoofer-output frequency response
(crossover set to 80 Hz)
21 dB/octave rolloff above –6-dB point of 80 Hz
High-pass-filter frequency response
(crossover set to 80 Hz)
12 dB/octave rolloff below –3-dB point of 80 Hz
Maximum unclipped subwoofer output
(all trims at 0 dB)....................................9.4 volts
Subwoofer distortion (from 6-channel, 30-Hz,
0-dBFS signal; subwoofer trim set to 0,
dialogue normalization 27)........................0.07%
