We have the same car...exactly! The FRPP kit is really nice. The rebound is a little fast but that's expected whe the suspension travel is reduced. The Dynamic kit is what they used for spec Focus racing and I wish I could afford it but the SVT/FRPP Springs work nice. I would try to find a bigger sway bar as well...that's my next mod.
Tires...not sure if Conti has the DW/DWS in stock for our rim size. I got Yokahama S-Drives for a good price and I like them a lot.
Lastly, get an allignment and make sure you budget for it or you will not realize the benefits of the drop and your tires will get ruined.
Autolite 103's, Cosworth CAI, FRPP Suspension, Strut Bars, DIY Short Shifter, SVT Air Dam, BSD, Poly Trans Mount...
Duratec Crew #55
Hatch Nation #55