I'll add another +1... Just put Eibach prokit in my car and it's better from every aspect. Just remember though it won't look slammed just right
Springs and decent dampers work well and will cost less than coils.
Eibach and Racing Beat springs both offer about a 1" drop. The ride quality doesn't firm up that much either. Pair them with some Koni Sport Active dampers and you'll have a ride quality that's as good, if not better, as the OEM setup.
CK