Can decide between the Coupe and the Sedan, but i know there not really fast, so i want to give them a little more power. What do you suggest? Also any run times. Can find any for the 328i, only the 335!

The best thing you can do for your bimmer, is to add an exhaust, intake, and remap your ECU. I have a 98 328is, and by adding a K&N intake, Supersprint exhaust, and having my ECU remapped by Speed Tuning USA, I gained 35hp, and 28 ft lbs of torque. If I were you, I would go with a new exhaust, (Remus), for a low boost in power. Without having your ecu remapped, you will only gain HP near the redline.