If I owned a pellet smoker I would burn the cheapest well working pellet I could get my hands on for heat/fuel (
Pit Boss Competition blend?).
BUT I would burn the best pellet I could get my hands on in a pellet tube for smoke flavor (LumberJack probably or something else about is good).
This would make things very affordable and allow for maximum control.
Inexpensive pellet for heat. Premium pellets for flavor.
Pit Boss Comp Blend is very very mild in my opinion so shouldn't cause any issues with flavor.
FYI, Home Depot around here seems to take orders of Knotty Wood and CookinPellet (both 100% woods) and is free delivery to the store. You may want to check the same if you have a Home Depot anywhere near you :)
I hope this info helps! :)