My favorite pellets are the Green Mountain Grill line-up. All are oak based. Gold blend. Fruit blend. Texas blend. They have also added a gourmet bag in a smaller bag for tailgaters.
Look for a GMG dealer near you and see what deals they have. I get the bags for 14 a pop from Eric over at The BBQ HQ in Simi Valley California. He delivers all over Southern California. I do not know where you are at. Just hit the GMG site and do a dealer search for your zip code.
The GMG bags are 28 lbs so I am paying .50 a lb.
Buying bulk is a great idea when you know what blend you like and you have a safe dry place to store the bags at................