Eibach Pro-Kit was absolutely perfect for me, nice good drop.. looks great. Did the rear myself (free) and Ford did the front for $350, including the front-end alignment. Not other parts needed, but will probably add caster plates & shocks/struts next year. Ride quality did not diminish one bit, minus the need to take it slower over speedbumps and dips. Performance wise, it put a HUGE smile across my face; not only the way it corners, but just the way it hugs the road in general. Safe & sound here. (pic in sig, before the drop)

 

The rear springs, dampers, and PHB are simple - a couple hrs if you are slow. The front is more difficult. I got frustrated because I didn't have some of the right tools and had to run out to Sears. The car actually spent overnight on the jackstands. Now...I can get a front strut out in about 15 min, the value of experience.