I would look to see what is available in your area. Shipping can be expensive. You may also be able to find others in your area who have pellet grills/smokers and place a bulk order.
I use BBQr's Delight. I like the balance between heat, flavor and low ash production. I have also used Fast Eddy's pellets and they were good quality and I have used Cookinpellets.com and they were fine.
I am not impressed with Traeger pellets. The composition is different depending on which side of the country you are on and I find a lot of long pieces that don't feed right and quite a bit of dust in the bags.