I'd say PDI, especially since you specifically mentioned that glare is an issue in your room. In my opinion, it's one of the best mods you can possibly do to a game. I had a bunch of people over the other day, and many of them were commenting on how good all the games looked with the non-glare glass.
I don't really see the point of Pinstadium lighting. It seems like complete overkill to me. I'm generally able to make my playfields look just fine with careful LED selection. If it's still too dark, the addition of two or three cheap spotlights works like a charm.