We have also settled on Lumberjack brand.  Can get them at the farm supply type store (Bomgaars, in our case).  Have tried blends, apple, hickory, alder, cherry, pecan, mesquite and oak.  We like oak the best most of the time, followed by pecan and mesquite.  This is on a pit boss grill.  Try different wood species until you find what you like.