Gus's Crossroads is the place to get higher quality Greek food. They do a buffet on Thursdays that is full of great Greek items such as baklava and mousaka. Every other day you can order these things off of the menu. They make a wide variety of non-Greek things, but you come here for the Greek.
They have a bar, so you can get all of the wine and spirits that you need to get the night off to a great start. They recently started a breakfast that serves all of the basics, omelets etc...
I think it's the best Greek in the Valley.