Avdh - my comments were specific to Mikey's question.....
I personally believe that the 5301 sport provides the finest allround driving experience of any 4 door sedan (except perhaps the M5 - I haven't driven one) - not necessarily the most performance, but the best balanced.
It is a combination of a lot of factors, steering, roadholding, handling, ride. Nothing betters this particular BMW in the way it handles all road conditions (except snow and ice). In particular, it excells at transitions from one state to another - braking, accelerating, turning, etc. This gives the driver a lot of confidence, and satisfaction. Enough for most people to ignore its shortcomings which are a woeful lack of style (remove the kidneys and the blue and white badge and it is just another car), and the cramped interior and poor build quality (compared to the Audi).
I love my 2.7T, upgraded with 17" wheels/tires, Eibach springs, and Koni shocks - it is a blast to drive - but I often find myself wishing it drove like a 530i sport. Not that I wish I had a 530i, I much prefer the Audi overall, but I can't deny that the BMW is the better driver's car.
I won't get into the M Vs S argument right now, but my last car before the Audi was the previous generation M3. It was the most fun car to drive I ever had including other MB, Saab, Fiat, Renault, Citroen, and Alfa Romeo (sorry April).
Unless you just like the ability to easily induce oversteer the 2.7T is a much better car both from a handling and value standpoint.
As an aside, I've driven the 330i with the sport package and it is much better than the 530i. I would buy a 330i over the 530i as the 530i doesn't get you that much room in the backseat or trunk.
EXCEPT WHEN Applying POWER TO WHEELS, Quattro may not provide any advantage over a well designed Dynamic Stability Control (DSC). I am not saying DSC is better it just depends on the design. According to BMW tests the 528 outperformed (did not skid off the course) the Volvo AWD,Audi A6 Avant, Lexus RX 300 in 3 tests (curve with ice/quick avoidance swerve and slalom). I have seen the video on the BMW CD (just came in the mail after I bought my 2002 330i). I have not seen all the test details so I do not fully buy this. However, the limiting factor in these performance tests is friction (do not need power. To avoid getting out of control, the better design will win.Again, clearly when you need power on ice/snow quattro will be better.
Quattro (Torsen) provides no advantage unless there is power applied. ESP works pretty well. (I've informally tested it :-)



