From someone who has essentially both of those cars (ok, a non-vanos 325 is slightly peppier than a vanos 320), the 530 sport handles remarkably well for that size sedan, but in pure driving feel, the e36 still wins, but not by much. I got the 530 two years ago because I needed the extra space for a family and my wife had only one argument when shopping for cars; it can't be more than 10 years old. With a manual transmission, it's a bit cumbersome in city driving, but in all honesty, I cannot think of a better car to own for highway driving. Ok, yes, there is one - a E36 M3 4-door, but then we're back to the 10-year condition again...
If you get the e39 530 sport, keep it stock. The BMW chassis engineers really knew what they were doing.
Last edited by granlund; 11-13-2012 at 09:14 PM.