If you have to pay for parts and want an upgrade the BAT kit is a good choice. This kit is the former European Mondeo high performance "RS" spec parts that include matched German made springs with about 1" drop and Bilstein made (non adjustable) shocks. BAT has specs showing that the drop still allows alignment can be performed within spec (without camber kits etc). As far as I know, nobody has disliked the ride, nor had anything but praise for the set's handling. at $600, hard to beat. The only other matched set is the new Koni setup with adustable shocks, only one person has it but gave a very good review..$750+ish through Terry Haines. Personally I like matched spring/strut sets...
If you want more drop, Eibach or H&R, with either BAT or Koni adjustable. But it will not be a matched set..still, many will vouch for these combos.
