my vote is for the 135 here is my setup thus far
135 jetblack, coral red leather, 6 mt, premium hifi, sports pack, ipod usb, bmw assist, idrive. I payed 43 grand out the door. Now i have spent just about 5 grand for all my mods which are sitting in the garage, and i know terry burger and will be visiting him for a tune when im all done. I should be making around 400 wheel horsepower so with my kw suspension will be able to easily track the car. So if you bought a 135 bare bones you could get it for under 40 grand out the door plus 5-6 grand in mods and you've got an m3 killer.
let the flaming begin!
2009 135 in transit
jet black, coral red, 6mt. sports, hifi, ipod usb, idrive
parts sitting in garage: RR intake, plenum, ddv, cdv, catless dp's, o2 sim, catback, bmw performance shifter, m door sills, cf spoiler, cf mirror caps, cf grills, cf pedals.