My first recommendation is finding out how your car runs stock, first.
If you can't leave it alone :P I would go ST coilovers, camber plates and a rear sway bar. And tires, get some good tires. Otherwise it won't matter what suspension you have.
Parking Lot Hero
2008 WRX daily driver
2003 ZX3 23D Autox Car 42 FSP
"Hella Functional - Raced, Not Hard Parked"