I've got an e46 m3 SMG and after sorting brakes suspension paint etc I'm now in a position to either supercharge or turbo it. I have absolutely no idea what to go for and where to buy? I'm on m3cutters but it seems more of a chequebook modding site! I know I can purchase an ess supercharger bolt on kit for around 5k but is there any tuners on here that know a bit more about the turbo route? I've only found the twin turbo hpf kit that looks mental, but is fucking expensive! HELP!!!