If you want a "stop light derby winner", go with the 335is. If you want a car to DD and track, go with the M3, the engine and suspension is much better designed to handle that work and will do it all day. The N54 turbo needs to be cooled properly to stay effective. although they have done this in the 1M. The M3 has more space in the wheel arches for bigger tires too. From a pure visual perspective, the flared front and rear fenders and the "power dome" give it much stronger "sense of purpose" than the stock 335 body, even with the M-sport add-on bumper
Based on my experience of owning a 2008 M3 for 3.5 years and 73K miles, 20K is "just run in" - assuming the oil has been changed properly.
M3 mods have a bigger surcharge than 335(is) mods. Add the 1M to your list!
"To suffer the penalty of too much haste, which is too little speed." - Plato
Last edited by ///M-ratedE90; 11-30-2012 at 08:31 AM.
Reason: Added stuff