if you have the money go for coilovers, i have ap coilovers on my cupra and the back is wound all the way down with the adjuster cups out and it sits perfect and the front is wound down to make it level.
you can buy springs but most only lower to about 30-35mm and after abit you will need new dampers.
have a look in my readers ride thread, theres a few pictures of the car when they fisrt went on. its a tiny bit lower than that now as they have settled, now a can't get me finger in the back arch