If you need the space, 335i Coupe would be your best bet. I owned one and loved it. It was 6MT, with a SSK, and KW V1 suspension. Best bang for your buck hands down. The 135i I might consider given lower cost of ownership, but I personally don't like the body style.
The only thing I'd be weary about is the fact the HPFP has never really been solved, so don't buy a used one without warranty.