If you are not a rich man let me reccomend the following. I've been using this coffee for 10 years with my stovetop espresso machine. Excellent and consistent. My bud uses it in a real espresso machine. If you plan to use a drip machine, I would go with something lighter.
http://www.papanicholas.com/store/item.asp?item_id=149
PS If you go to the home page, they are having a 25% off sale until June eigth.