In my humble opinion, I don't think you'll notice a difference in using the MBT-RX (analog out) versus another BT receiver with a digital out, partially because the RCA run would be short (I.e. low likelihood for interference). You'd basically be betting on whether the MBT-RX or VXi has a better DAC. But, if you already have the VXi remote installed, then it would probably be easier to use some BT receiver that has a digital out, just so you're not introducing another remote/switch into your system unnecessarily (and adding unnecessary expense). I'm sure you can find another 12v BT receiver with a digital out. I haven't actually looked, but I'm just guessing it exists.Cool, I do have the VXi remote, and it's right by my power source switch so it'd be an easy thing to do.
Will there be any difference in audio quality going with the digital output vs the RCA for the Bluetooth receiver? Does the VX800/8i have a built in DAC essentially, so does it not matter?
I want to go with Bluetooth 5.0 so I can get long range and have my phone outside the van when music is playing (my rear speakers are mounted on the doors, so they can play outside music when the doors are open while camping). Otherwise the MBT-RX would be appealing for 12V power wiring. As it is with the other ones, I'd need to use a voltage regulator to 5v DC, or use the AC adapter to one of my outlets.