What's the best imported Greek beer to the U.S. and is it sold in the Philadelphia, PA area?

There is the Alfa Beer, the Aris beer and the Marathon beer which are Greek and are imported in the U.S There is also the Mythos beer which is really nasty. In my opinion the Aris beer has a special taste which i really like, Alfa is average, and Marathon below average. So I'd say you should try the Aris beer which, compared to the other ones, is the best.

Are there any particularly good Greek beers available anywhere? I am not trying to be sarcastic. I have really never heard anything good about Greek beer (and I've tried good beer from many places).