http://bimmerfest.com/forums/showpost.php?p=1800046&postcount=68

I've input these and the revised standard features into my price comparison database. After you adjust for increased standard content, the 328i costs $1,200 more than the 325Ci, and the 335i costs $1,375 more than the 330Ci. These figures do not adjust for engines, wheel sizes, or audio.

Since the 335i's standard HK system is now a Logic 7 setup that costs $1,200 with the 328i, vs. the $675 extra cost of last year's non-surround system, the additional cost for the turbo six is as little as $850. Very rare, a BMW bargain.