Hi Stiggy,
welcome to Rune Audio.
I'm wanting to hook up a dac from hifiberry
All Hifiberry DACs work with RuneAudio you only have to enable them in /boot/config.txt.
See
here.
and this rgb screen
This is a bit more work, please search the forum.
Spend a bit more money and use a 7" touch tft, because it works out of the box.
Frank