Great review!
I drove a similiarly equipped 535 this past weekend @ Princeton BMW here
in N.J. It's definitely priced to sell. But I did find the steering a bit
light compared to my E90. I couldn't floor the accelerator as much as I would have liked (car had less than 100 miles on it), but it felt quietly quick and smooth.
I agree on the handling, even with the standard suspension, it was quite good. I took an onramp really hard with a total of 4 of us in the car, and it DEFINITELY is an improvement over the E60...does indeed feel very close to my E90.