The GTD is like a blow up doll. The GTI is like a proper woman. Sure the doll might last longer, and the woman might have higher running costs, but which would you rather have?
CHAV ,you getting a burberry baseball cap to ?
Also note that the latest VW revision D (I think its D) is also pretty good and is up to the job of a remapped car. I have the the Forge one on mine.