Hard to beat OJK for a fine natural smoke with jolt. Other than the obvious Gawith flakes, ropes, and mixtures known for turning some green. GL Pease Robusto can pack a bit of a kick. C&D Kelly's Coin is a good plain burley blend, similar in vein to 5 Brothers. Some find GL Pease, Haddos Delight quite strong. A fairly new blend, Peterson's Irish Flake has a nice kick.