The sts is a fun mod i have a focus central one and it is a ton of fun. I would get one because it would make driving much more enjoyable.
Performance:K&N conical filter, FC UDP (2 pc.), Focaltech P&P head, OBX race header, flexpipe, Borla exhaust,
Suspension: SVT rear sway bar, Prothane Rear swaybar bushings, KYB AGX shocks and struts, Tien-S springs, Focus Sport front and rear strut bars
ICE: Kenwood headunit with Sirius