I have tried some of the raspberry Pi screens and was not real satisfied with the solution. Then I found a compatible android app that works quite well as a front end for the PI (note must be Android 4.4 or above). I went on Ebay and found a place selling older 4.5" cell phone for $20.00 built a mount for it and TA DA functional wireless touch screen control for the m2. You can use it to change filament monitor prints pretty much whatever you want. All that was required was to configure it to my network and tie it to my raspberry Pi. You could use a cheep tablet if you want a larger screen but I didn't want to give up the space.
Some of the real advantages was to quality and speed of the touch screen.
Built in keyboard.
Can take it anywhere your wireless goes and monitor your progress.
CHEEP. If you have the Octoprint running it cost me $20 to my door. (Note you can still connect with a web browser to the PI while using it)
