I like South American and Panama sources for affordable roasts. African beans frequently have a citrus note (nice way of saying sour taste or aftertaste). The Sprout's market had a 'Hawaiian blend' that was pretty good but no indication it was grown in Hawaii and I could use their in -store grinders. Just remember to use the little 'cleaner' lever (small metal hook near dispenser chute) to get the flavored shit of the prior customer out of the dispenser or you'll get some of that in your grind when it's your turn to use the machine.