I just figured out I can add the sport suspension (500 $) alone without that ugly body kit

is it worth that? I would replace the springs to lower it anyway I think, not sure how those sway bars compare to aftermarket

 

Talk to Adam at Alta. I think it's worthwhile to get heavier/thicker anti-sway bars (as a general concept), and I'm not sure about whether or not aftermarket ones are available for the R56 yet, but Adam posted something the other day to the effect that they are available. No details, though. If you can go aftermarket for sway bars, and are swapping springs as well, then ther'd be no reason to get the sport suspension as far as I can see.