[Butterspa]

Finally going to let my 1996 Nissan 300Z go. Great car but long in the tooth and need a back seat now that I have 2 little kids. Debating between a certified pre-owned 2006 M3 convertible 6MT with 23715 miles vs a new '09 Infiniti G37 sedan automatic with sport package. Will use as a daily driver, kids in car on weekends only. Vert has 19" wheels, heated seats, HK sound, Nav. Leaning towards M3 but a little concerned about maintenance on it. I tend to keep my cars a long time. (My Z has 113K miles on it). Price will be similar, probably a bit more for the M3, especially if I wait till the 2010's are out on the G37. Any thoughts, comments would be greatly appreciated.