Hey mate! Coast is my favorite form of entertainment, period. I grew up with it.
As far as classic shows/guests let's see... there are so many!
Area 51: the Bob Lazar interview.
Oh jeez you know what, go checkout some of the streams at www.shoutcast.com, go there and search Coast to Coast
AM. There are a few stations that re-broadcast classic oldies!
You might be able to gauge the quality of various shows by checking some of the C2C forums where nightly on-line conversations about each show is
archived. I won't mention any here, but you can use google and search on coast to coast and my handle/name here to find a couple of them. Some
shows are great, some just suck, but the older shows with Art Bell were the best.