If you've got a "bad back" and the ride on the GTI and Edition 30 can be a bit SHARP (!) -especially for passengers- it's worth going for Koni FSD's. BRILLIANT !! They transform the car. Buy from Awesome and get someone to fit who knows what they are doing. Probably not a main dealer because they will be 2 or 3 times more expensive. Hope this helps. I was a bit dubious for a time,thought about it,did it and have not regretted it for a minute.
Regards, Paul.