Is the 35d an option for you at all? If so, would at least test drive one while you are looking at the other two models. I was hitting 5.4sec 0-60 with a stage 1 tune (no bolt ons or emissions deletes, just a tune) and that was with run flat tires / 20" sport package. Mileage is awesome and you may find yourself addicted to the power delivery. These things become absolute monsters if you start going to higher level tunes. Just throwing it out there