I have tried and tested most aftermarket suspension solutions, from the bottom of the market FK and Gmax stuff right to 8k+ Bilstein setups. I find the B12 setup to be the best on most cars that use the MK5 platform, nothing else has impressed me that greatly. In comparison the KW and AP setups seem a bit to harsh.
Suspension is a very subjective upgrage, we get people come in with some really rubbish ebay coilovers that have broken after 3 months claiming that they were fantastic and the handling was great although they then realise how bad it was when they freplace them with something good. Until you have tried a few setups you cant judge how good it actually is, most buyers dont get this opportunity, I am fortunate that I do
but what I like may not be someone elses ideal.