Replying to Grateful Dead

I've been listening to lots of their music in bits and pieces over the last couple of months more then I normally do by a lot. I'm currently in the process of listening straight through to the entire Europe 72' Tour concert by concert in order. What are some of the best dead songs from that tour or in general you guys like to listen to. I have been absolutely fascinated by their music and everything surrounding them, any other dead heads out there.