I bought and installed a Pioneer DEH-X6710BT head unit. Having Bluetooth to stream stuff from my phone again is nice. I had assumed that you couldn’t use Bluetooth in a greater than one-to-one configuration, but apparently that’s not the case. So I might be able to use my phone with both my OBD dongle and the head unit at the same time.
It’s also nice to be able to make hands-free phone calls again.