Do not spend any extra on the GTA clutch. There is no point.
Standard will be fine all the way.
Here in Sweden it happens to be so that John´s GTA clutch is cheaper than a standard clutch
John´s GTA: 2 233 SEK (=235 Euro) + 267 SEK for shipping = 2500 SEK
Original Sachs: 2810 SEK if you buy it from a Swedish retail trade.
GTA clutch: 3 375 SEK if you buy it from a Swedish retail trade.
Coupeteile sells Valeo original for 289 Euro = 2 746 SEK
AA (UK) sells Valeo original for £147 = 1 778 SEK
So the UK guys can get a original clutch pretty cheap
. Damn it´s so cheap that it make sense for us swedes to buy from AA.
P.S I haven´t checked with John what he wants for a standard one.