I've been super excited for this HU and now that it's shipping and expanded info is starting to become available I have to start looking for another unit for my Z.
The 9990HD has every feature you can think of but it looks like they dropped 5.1 output from their devices this year. From what I can tell it apparently takes 5.1 sources and downmixes them to 2 channel audio only.
Perhaps I'll fall back on the 9980HD. I'm hesitant to pick one of these up due to the sluggishness of the unit but it might be the way to go for now. I'd wait for more of the 2012 HU's to come out but after a month of driving without acceptable audio I'm starting to get impatient for a solution.
