Purchased a new Z4 3.0 in 2005. Really liked it but really wanted more power through the shifts. Found a 2007 M roadster at a dealer with only 9000 miles on the clock. Dealer let me have a 50 mile test drive through the hills and twisties... OMG! That's the way to sell a car! This is the car I have been looking for! Power, handling, looks, all there in spades. Here is a surprise! Just drove it to Idaho up lonely hwy. 93 through Nevada. Round trip of 1600 miles and ran steady 75 to 90 mph. Averaged 25 miles per gallon. Didn't buy it for fuel economy, but was not expecting this! One diss... Why does the nav pop up every time you change the radio station?
Power & handling and the feel of the cockpit.
Nav. system could be more intuitive, takes some practice and a lot of remembering what to to next.