really? is that over a fairly long commute as i guessed would be low 20's urban cycle?
M3 isnt that tuneable its already over 100bhp per litre! Bit heavier than 335 as well. Latest N55 engine is single turbo but twin scroll. Pulls from 1500rpm up to redline. Previous N54 twin turbo is awesome also and probably little more tuneable. Have a bit of an issue with waste gates though.Tuning to 360/370 is simple with just a remap. Add downpipes intercooler etc and you have 400/400Brakes are awesome as standard. If you go more power though you may want an LSD and M3 rear subframe is good mod.3-5k would get you a car on par with an M3 but with half the running costs.... Although you dont get that AMAZING M3 NA engine obviously!
Brakes awesome! Are you coming from an mk5?