In the last 2 weeks or so I have had B12 kit, the S3 swingarms, S.A.L.K and front bushes and a full 4 wheel alignment!
It's slightly firmer but much more comfortable, much better grip and better handling.
I will probably invest in better roll bars in the future but for now I'm just enjoying the improvements made so far.
I do honestly feel that they all compliment each other, not one of the mods is stand out better than the rest, they work as a unit.