best bang for your buck gears.... probly gonna be Genuine Gears. life time warrenty is hard to beat but they can break (as can any gears if not set up right)."LIFE TIME WARRANTY! break it, burn it up, blow it up! NO QUESTIONS ASKED!" -genuine gears.
youks are damn nice tho... they have earned their rep for a reason.... so if it were me... i would go with either one. JUST BE SURE YOUR INSTALLER KNOWS FOR SURE WHAT THE HELL HE IS DOING!