I am about to buy the 325i and just have a few questions. I udnerstand this might have been discussed already but:

1) is there a more confirmed / accurate date when the 325xi will ARRIVE at US dealerships?
2) if I want to change to snow tires during winter for the 325i, does that include changing the whole WHEEL due to the special run-flat tires? How much approximate would it cost me to change to snow tires?
3) there have been quite a few posts about a constant broken "noise" on the e90 driver side / seat belt, I am just curious if EVERYONE car so far has experienced this problem or does it seem to be a specific assembly line?
4) most people seem to post a lot of "I am getting my e90 delivered tomorrow!" Do these orders tend to be specific customizations that need to be shipped over from other parts of country? What I mean is, is it "less good" to get a new 2006 325i that is currently available and sitting at the dealership?
5) will the later/september production batches be more "perfected" in anyway? So is it wiser to buy later?
6) I plan to live in an apartment that has OUTDOOR off-street parking, and it will snow like crazy during the winter. Without a garage, how much damage would the cold weather / snow do to the new 325i if any?