If you're asking which ORDER of preference of the three mods, this is what I would do. Keep in mind I have PDI and ColorDMD on all my games. I don't feel I need Pinstadiums personally.

1. PDI will ALWAYS be my first choice. Why? Because you're ALWAYS looking through the playfield glass during the game. I won't try to defend whether the price is worth it because to me, it is.

2. ColorDMD is a MUST as well. Do you NEED it? No. The DMD display is kinda secondary anyways so all this does is help upgrade the overall look of the game. Case in point - I just installed a ColorDMD on a friend's BBB and was amazed at how it immediately modernized the look of the game. The original orange DMD on that game made it look so dated.

3. Pinstadium. Never used this product, never felt the need for it.