I am looking at a used 3 series and not sure if the Sport seats are the best option? For one thing, all the BMW seats seem to sit low (No high position adjustment). The Premium package seat feels comfortable but lacking any support (Might be more comfortable). Any suggestions on seats? Does the luxury line offer a more comfortable seat? Does anyone have any issues with the sport seats on long drives, especially underside bolstering? I recently sat in a new A5 and it seemed to be pure comfort on the Audi end. I do have the sport seats in my VW Golf Sport Wagon (SEL) and they are comfortable but not as stiff as BMW.