Raspberry pi 3b + Digi+ Pro

hi , everyone, i’ve got Volumio on a raspeberry pi 3b with a Digi+ pro , it worx very well , it’s sound better with the digital cable then the HDMI cable. But here’s my question , i wanna know if someone as the same setting but with a touch screen mount on it?

I wanna add a touch screen and i don’t know wich one to buy.