6yrs Brasilian JJ here. I haven't trained in several years but I say go with BJJ definitley and learn the art of suprise. IOW, if your suspect in your art your opponent is likely to be prepared for your take downs. Back when I trained I sparred around quite a bit with fighters of different...
http://www.ast-ss.com is your best source of Creatine, Andro supplements and protein IMO. I had very good success using their supplements and stand by their claims.
-Tony