Mandinca, do a check on your VIN# for which options you have on your car, which includes the suspension (should be option# 704 MSport Suspension within the list that comes up) Good idea to print this off or just save for future reference.
As for your question about lowering kits and stiffer suspension - YES. Spend the time reading the many posts regarding suspensions, it will help guide you to a set-up suitable for your specific wants/needs.
A good place to start is below link. It can get overwhelming and some YouTube videos can ease the learning curve. Or just ask someone reputable what to put on the car, which is much easier. I just like to educate myself on what I am getting/deciding on.
http://www.1addicts.com/forums/showthread.php?t=1233372