I have purchased two 8000Nex, one was brand new and the other was a refurb, both from authorized retailers.  The refurb started acting up by freezing all the time and then rebooting itself, the brand new one operated fine up until the screen moved to eject mode and became completely unresponsive.

I have sent both back under their warranties and the only thing they did on both was update the firmware; both units have been reinstalled and are suffering the same exact problems after only a few hours.

I've owned a D3, F90BT and a 7000NEX with no issues.

Anyone have any thoughts or input?

Not me. Sent my 3 yr old 5000 back to Pioneer earlier this year for replacement of the internal SD card. Apart from the fact it took about a month to get the device back and the fact that their communication sucks, no problems after the fact, Unit is working fine,

I'd email them (try calling but good luck, I remember it took ages for them to pick up) and get them to honor the warranties by fixing the devices as they should have done the 1st time.