See, I find any non-M cars to be dull places to be, regardless of turbo and LSD (a car doesn't need one to be fun, y'know), and couldn't see a 135i of any power output this side of 500bhp to be fun. A good 1M yes, or the E46 M3, but not the shopping trolley models.
Still great cars, don't get me wrong, but if I was buying as a fun car I'd want a little pizazz to go with the (probably) grey car.