I have a spare G that I plan to use in the same manner. It's mostly gutted of it's audio equipment, used to build up a pair of H's. Like you, I plan to mount a standard monitor (for me, I'll use the title page hardware as the mount). Non-touch, since I want to keep it relatively stock looking and that means not doing anything too drastic with the front glass. I've been thinking of completely replacing the button panel, though, since I just don't see the numbers mapping to most juke software. Most of it is up/down/left/right arrows and the keypad can only accommodate up/down. Though I've only just started looking at it, so maybe I haven't put in enough time to work it all out properly.