well i would go for heat sink, i only paid 6 quid for mine!! new !! but i run them on back, with a grind and they were badly which is a problem! but saying that shud be brill for the front, koxx bloxx are mean!! brown is hardest compound which lastes about 1 year with grind and yellow is soft to soft, i would go blue as they will have a really long wear rate, and will grip rele well! :blink: