I've got PSS9's which are on standard ride height atm. However, I did have a set of Eibach Pro Street S which can be lowered front/rear by 35mm-65mm.
Here is some pics of Scotty's car (on Eibach's) just to give you an idea...
http://www.r32oc.com/members-rides/1...coilovers.html
Unfortunately, I have no intention of lowering mine anywhere near 50mm let alone 65mm for practicality reasons. I reckon you may be struggling to find many peeps out there who have lowered their R32 to the max?
The lowest MK4 on here is Pomme's and he's got air ride?