I think the Manor is probably the best movie theater in town. There is nothing fancy about it, although they did renovate in the past few years and add a bar where you can have a pre-movie drink or order one to take to the theater, but this place is great. The theaters are small, the previews are very limited (maybe one or two), no commercials, just straight to the movie.
The only downside to the Manor is that parking in Squirrel Hill doesn't come easily or quickly so you have to work that into your schedule so you aren't late for your movie.