Of those 8 AVRs, only the Sony DG710, DG810, Onkyo 605 and HK247 handle audio received via HDMI. The others require separate audio connections from sources to the AVR.
Of those 4 AVRs, the Sony DG810, Onkyo 605 and HK247 handle high def audio (PCM) decoded in an HD-DVD/Bluray player audio and received via HDMI.
Of those 3 AVRs, only the 605 will decode a high def audio bitstream received via HDMI from an HD-DVD/Bluray player.
Of those 4 AVRs, the Sony DG810, Onkyo 605 and HK247 handle high def audio (PCM) decoded in an HD-DVD/Bluray player audio and received via HDMI.
Of those 3 AVRs, only the 605 will decode a high def audio bitstream received via HDMI from an HD-DVD/Bluray player.