doesn't it depend on what you want -
135 for excellent performance and the ultimate drive.
125 for something close to a 135 but doesn't cost as much.
123d if you are happy with a compromise of relatively good performance and fun but don't want to visit the pumps that often.
it is certainly better than Golf GTD
Car UK gave the 123d a good rap.
http://www.carmagazine.co.uk/Drives/...ontent-block=0