I too want a better setup nt necessariy a drop, but as the car is already lowered I like the benefits of that. Got an Eibach rear ARB and Superpro bushes to go on too.
The Sportline kit will have a bigger drop but there seems to be no such thing as a Pro kit for a GTI - these must be 55mm struts with roughly the same axle weight rating, but advertised for a tdi etc.
But I'm sure the B8 shockers will fix my woes.