PSS are being discontinued for general use I think soon enough, well thats what my friends who work at a porsche dealer told me, which is why they're starting to be hard to come by, they will continue to provide for oems that were designed for those tyres, but I think the PS4 is designed to be it's replacement, not to offer all out grip, but close to, and cheaper whilst providing very good all round ability and wear which is a big factor which made my mate take them off his S3, he would get 10k at a push, where as my PS3's on the gti have been on for 5k and not had any sort of wear. (different power etc but still)
Personally for a GTI I would get the PS4, newer tyre, good wear life, good all round tyre, kind of perfect for a GTI which is an all round car
