hobie, I think that no one mentions Penzance is because it is almost impossible for a new guy to get, why torture them with an all world blend they cannot find? lol
domgregs, welcome to the site, you have received tons of great suggestions so I will add the following. If you wish to be considered a gourmand and man about town, then the following blends are a must for the distinguished pipe smoker.
Middleton Cherry
My Mixture 79
Borkumm Riff Whiskey
Smoking these will let everyone know you are a man of taste and class. lol
Seriously here are a few of my favorites that are good for a beginner.
Dunhill Flake
Astleys 109
Fribourg & Treyer Cut Virginia Plug
Escudo