I'm considering buying one as well. Any impressions of the car? How's the ride quality? It the exhaust annoyingly loud when just driving casually? I would be coming from a 335, and am worried the Z4 will be a bit too hardcore and lose the comforts of the 335. I think you got a good deal - I'm looking at doing ED for about $350/month with all the MSD's similarly equipped.
ED # 1: 5/27/2010 - 2011 E92 M-Sport