Finally got a radio. Got a part number from the dealer who tried to offer a replacement for $5300 (WTF?!!) Looking up the part number i found a refurbished radio from a BMW online parts retailer and grabbed that instead, $850 with $1100 core charge). It's installed and seems to be working. Some menu items don't seem to all be there but that's OK.
Biggest issue is my satellite radio isn't working. Sirius can't send it a signal, I have to pull the radio to get the radio ID. Is this normal? Did the tech forget to hook something up or check a box on install?