Paraneer - it sounds like you used both the amp and pre-amp sections of the AVR's you tested. The OP has Bryson amps for his mains, which means he is only using the pre-amp section of the AVR and that might be in a Pure Direct mode for stereo. My experience is that the amps can be as important to the sound as the preamp, depending on how they mate with your speakers.
So my suggestion remains, time for the OP to listen to some options in his own setup.
So my suggestion remains, time for the OP to listen to some options in his own setup.