im in the process of doing the same and got some good advice from the guys on here
slightly lower but not affecting the ride quality, i was recommended the following:
- Bilstein B4 shocks (or Anni shocks)
- Eibach Pro Kit (-30mm drop)
i will probably look into some powerflex bushes as well at some point, and a lot of people seem to recommend a rear anti roll bar (apparently Whiteline do a good one)
hope that helps