I just did a Discs of Tron to MAME for a friend (the cabinet was already gutted and converted many times over until it ended up a Road Riot 4WD) and it makes a good MAME cab if you limit your CP to a few buttons, one stick and a TB or some variation of the same (no 2 player 12 button CP's!!)
We kept the CP inside the dimensions so we didn't ruin the lines of the cabinet and it fit and looked nice.
Tron cabs look cool due to the unique shape.