A little update. Yesterday I had the rear H&R ARB fitted. Quite simply it is incredible how the car drives now. I knew it would help from the previous reviews, but even I wasn't prepared for the performance difference.
The car turns in beautifully and sharply. It follows the contours of a bend to perfection and feel more grippy too. For the cost this has to be the best modification on the RS3 8V.
I also had Ferodo DS Performance pads fitted to the front, and the DS2500 on the rear (as there is no DS listed for the rears it seems). Will report back with review once bedded in, but so far they feel leagues better and much more bite.