I would go with a powder from a reliable source. The pellets may be cheaper and non-controlled, the powder will yield a higher quality product because there will no binders/fillers like the pellets leave. Good luck!
Hell Yeah! I have much respect for him. I have his pics on my computer but decided to use it when you made the post on the Comp Bodybuilders section. The Sergio pic in your avatar is just classic. It's one of my favorite BB pics of all time.