I agree. I just tested the 328i. Was very surprised how responsive, powerful, and refined the new 4 cylinder really is. It is obvious a great deal of engineering detail was put into this engine as 4 cylinders are hard to make world class but I believe this one is. It has a distinct quality sound and vibration is virtually non-existent. I believe they likely used very fine tolerances (to minimize any vibrational effects) and highly engineered motor mounts. Whatever the case, it is a winner. Especially with the substantial mileage improvement. I owned a 335 and will keep it, but I'll look for a 328i convertible to add at some point (I want them to fix the side impact rating to equal that of the sedan). Great driving car!