I had a performance centre add some Lovells that dropped the car 1 inch all round. In my opinion it sits just perfect. Heres a before shot:
and after:
When you are deciding on springs you should also consider the driveability of the car not just how it will look. What I found after the mod was the car 'points' so much better (no wallowing). I have had the odd scrape with the front spoiler but driven carefully its not been a major issue yet. Go too low and you may start breaking stuff which could be quite expensive to repair, particularly if you happen to scrape the bottom of an extractor.