Definitely get the Holy Grail. It was one of the best DVD's of last year.
The rest depend on how big of a Monty Pyton fan you are. Im holding out on "Meaning of Life" in hope that a SE is on the way. Could be a long wait. I've also never wanted to pay that much for "Life of Brian." :violin:
As for the show, look into renting "And now for something completely different". It gives a good array of skits from Flying Circus. Its sort of like a greatest hits.