Delivery timing advice

[MSJ]

Hi folks, I've been lurking for a few months, and appreciate all the insights and information on the forum.

I'm looking for some advice about timing the delivery of the '08 4.8 I ordered in late December. My '05 330 lease expires 2/28, so I worked with my CA to try to time my order to (a) coincide delivery with this date but (b) take advantage of the Dec OLP.

Here's the timing problem - X5 is in production, scheduled to complete on 1/21, which is a couple weeks earlier than I was expecting.

I understand from searching the forum that I can have the dealer ask BMWNA to hold it in SC (Priority 4?), and I suppose that my dealer would be willing to park it on his lot for a few days - but should I be concerned about the car sitting for upwards of a month (lot rot, flat-spotting, battery issues, etc)?