I had to go look up the specs on the Onkyo TX-SR674. It is apparently equipped with two HDMI v1.1 inputs, which means that it will accept multichannel PCM via HDMI. I talk a bit about this in my
HDMI FAQ , but basically there should be no issue with using HDMI v1.1 for a long time to come - in fact, it's likely that many HD-DVD titles (including all made to date, if what I've seen online is correct) will require that the decoding be done in the player even when HDMI v1.3 is available.