Thanks for the reply Yorgi.
I looked at the CarFax, and both seem good. Both have excellent service records. No accidents, that have been reported.
I've never had an SMG, which I am assuming the 2008 is, since it has paddle shifters. I've read some reviews on it, and some reviewers absolutely hate the SMG. I took out an M3 SMG the other day, and experienced some crazy head-slapping against the headrests. So, that was a little disconcerting... but the rep says the car has to be reset, and learn my driving patterns. Is that true, or just BS?
The pre-purchase inspection sounds like an excellent idea. And I will get right on that Top Not Locked thread.
I was just told by other BMW owners to make sure there are no common/recurring issues, especially with the transmission... but more especially with the SMG because of the added electronics and computer control.