Owned a 530d Sport with the autobox for just over a year.
great car.
Average 32-34mpg
Mine has lots of toys, leather, sat nav, xenons etc, quite a few around so look at a few and try to get one with some of the toys fitted.
Not had any real hassles with it.
Did get the software updated though as the i-drive decided to throw a wobbly a couple of times but since the update it's been spot on.