Very nice review! You did lots of work on this. A couple of things I know from use of the DX120, the back has a screen saver on it of plastic and that is why you see scratches. Under that is glass so nothing is really scratched except the screen saver. I use 2 400gb cards and thought the scanning was actually very good. Better than any of my other daps for speed. Lots of very good info here!

Thanks for the detailed review including some very interesting measurements, clearly a lot of work put into it and very informative : congrats!