groundFungus:
I sounds like 2 serial ports would be convenient. One to communicate with the device and one (Serial-USB) for upload and debug so the Mega might be better to use. You can do the same with an Uno, using a software serial port, but the Mega would be easier and allow faster baud rates for the second port (Serial1).
Thank you for that answer. Seems logical when you put it like that 