OEM springs will lower the car just a little over an inch. I was going to lower my car but decided not to, I even ordered the springs (AC Schitzer).
The mechanic at the shop suggested the H&R springs. This is the one that lowers the car 1.5" front, 1" rear and would look better. The other brand that is popular is the Eibach. Most other springs will lower the car 1.25 front, 1" rear. When it comes to springs, aftermarket ones seem to be better quality. I think Bavauto has springs in the clearance section for your car... check it out. Post pictures of your car if you can. I want to see those wheels...