Well I just purchased the NR609 but there is a story behind this. The Pioneer AVR in my family room system just had a right channel failure and rather than getting it fixed (it is an entry level unit) I went to the local HiFi store and saw the Onkyo on sale for a song basically. It was marked as customer return/repair and on questioning the sales agent, was told apparently the HDMI board had failed and had been replaced by the authorised service center. This wasn't too long ago.
Given the almost 50% off new the store offered me and with the same as new warranty I bought it. At the time I didn't know the HDMI board problem was quite common but hopefully with it having been replaced recently, it will be a board with the manufacturing fault corrected.
As an aside this isn't the first time I have had an Onkyo AVR fail with a HDMI board problem. Two AVR's ago I had the NR-TX576 and that unit's HDMI board also failed. Since it didn't do Dolby TrueHD or DTS HD MA and repairs were going to be expensive, I ditched it. Onkyo don't seem to know how to design solid HDMI boards?