I tried a number of combinations on my car over the years. I am an older guy but still an enthusiast. I wanted a suspension that allowed passengers in my car to enjoy the ride, I wanted it to have a nice stance and to handle well.
After experimenting I found it was important to get dampers that were intended to be used for lowering springs. Putting lowering springs on shocks that were not designed for them really compromised the amount of travel of the shock and that translated into a compromised ride with all sorts of unwanted results = diminished ride quality and diminished and even dangerous handling (bottom out while taking a hard corner).
What I found that I absolutely loved, were rock solid, took a beating and did everything well was this combo.
Bilstein B8 sports for MK6 all around. These are designed specifically to work with lowering springs and unlike the ones for the MK5 which are too stiff they provide a very compliant ride.
Eibach Sportlines provide the kind of drop that I feel is just about right for my tastes. I prefer a look with just a small gap between tire and fender.
This is an excellent combo you can drive everyday and take to the track on weekends.
The other item I added was a set of Eibach sways which are 23/26 mm f/r. I found that running my swaybars on the more aggressive of the 2 settings did contribute to a much harsher ride when daily driving. Swaybars are great for helping with body roll and weight transfer but it also transfers all road imperfections from one side to the other as well diminishing your ride quality by a noticeable margin.
Also I had replaced all suspension bushings with Whiteline polys. For the most part, the increase in noise and vibration was something you could notice but didn't really compromise the ride quality by any significant amount.
Just thought I would share. I went through the lowering springs on stock shocks, Koni FSD and then tried this Bilstein shocks and they were a huge winner. They are not adjustable but I never wanted or regretted not having any adjustment, these are properly valved for our cars.
BIL 35-158745
Item: Monotube Strut Assembly
Fits: 2011 VOLKSWAGEN GTI Base
BIL 24-158756
Item: Monotube Shock Absorber
Fits: 2011 VOLKSWAGEN GTI Base
Eibach Sportline Springs
All the above has now been replaced on the suspension and it is now going to be much more track oriented with no regard for comfort at all.