For those of you who knows some German. An article from german car mag AutoBild.de comparing the 530d, 530d GT and 730d.
In the end the ranking is:
1. 530d
2. 730d
3. 530d GT
For those of you that don't understand german, there's plenty of pictures comparing the cars.
http://www.autobild.de/artikel/bmw-7...=40&now=27#mmg