That’s an excellent one and I even have a poster from their live performance of that in Philly. But it’s tough for me to pick a favorite episode. It’s definitely in there with The Waitress is Getting Married, The Gang Turns Black, Charlie Work, The Gang Beats Boggs, The Gang Tries Desperately to Win an Award, the D.E.N.N.I.S System, Mac Day, the World Series Defense, Chardee MacDennis, The Gang Solves the Gas Crisis, Wolf Cola, and The Gang Broke Dee as the best of the show. I could (and have) watch each of those episodes dozens of time. 99% of comedy’s are not worth rewatching, but the best Always Sunny episodes are up there with Anchorman and Christmas Vacation in rewatchability and quotability.