Try to find an actual historic arcade. The games make more sense in context. In particular, Tempest has been redone in a dozen forms, but without the original spinner controller it's just not the same.
(QBert, on the other hand, is just fine in emulation.)
In the Northeast you can go to Funspot:
http://www.classicarcademuseum.org/
It's got the flavor of the real thing. Takes me back to the old days.