BrianNC 
2009 BMW Z4 Convertible sDrive30i 2dr Convertible (3.0L 6cyl 6M)
Great CPO purchase
 This is a very nice choice for a 2-seat convertible. The ride with the hard-top up is very quiet. It is surprisingly comfortable and roomy for taller drivers. I find the throttle response a bit lagging in "normal" mode, but the "sport" mode is much better, making it quick and responsive.  It feels very solid. No rattles. I have had mine for about 4.5 months. Got a very fair deal on it as a CPO BMW with warranty until 2019. It is a very good-looking car, especially in black, which matches the front windshield pillars. No problems at all with it so far.