Found a place I can buy sprockets with tooth changes in Canada. Their kit comes with a 525 DID VX gold chain and a JT steel front and JT aluminum rear. They have an option for AFAM, .Renthal and Vortex. I can get them in steel if I want but I figured what the heck? So between AFAM, JT, Voretex and Renthal. Which aluminum rear sprocket is best? I'm assuming they are all hard anodized.