The one thing about Game Galaxy - Symrna is that some games are so unlevel that it's hard to play a *solid* game. The collection is impressive, but with that kind of size it's hard to keep every game 100%.
I would not recommend Headquarters. The games all played like crap, left very unsatisfied.
We went to Flashback arcade in Murfreesboro and the games were well maintained and played nicely. Consisted mainly of newer Sterns with a couple WPCs, but was a much better pinball experience than the other 2 locations. About 30 mins away form the city IIRC.