cool. you'll really enjoy your car. i'm not a big fan of autos.. but then again, i've only driven a manual for a year or so. maybe it'll wear on me, and i'll pick up an auto later.. altho at this point, it's highly unlikely.. maybe a SMG tranny, but even that's up for debate.
you really don't have to justify your choice one way or another. (even tho i'm guilty of inquiring WHY?? at times ^^;

it's your money, and you spend it as you see fit. having said that, it is a bit disappointing that people are picking up zhp with steptro, since any perf gained by tweaking will be sapped by the auto tranny back to regular 330i manual-ish if not lower perf numbers. but then again, if you were thinking of getting a 330i steptro anyway, then you'll benefit from the boost. not to mention way way better looks over stock 330i.
i love my car, and even tho the payment is killing me, i still smile that broad smile everytime i step on it. (even if i wish i had an m at times.. ^^;

and i think that's what it's about anyway. better than saving few bucks a month to settle for a car i could easily afford, while robbing me of my driving enjoyment imo..