I went up to BMW Seattle to test drive a MZ4 -- but really didn't see a huge difference from my 2006 3.0si. However, I did test drive a 135 that I thought was great. The only problem is that all of the 1-series cars at BMW Seattle have automatic. I've had three roadsters -- all manual, and one 3-series that was automatic. I really didn't like it in the 3-series. The steptronic I test drove seemed pretty quick...but I didn't get to test drive the manuals. It would be easier in city driving not to have to shift of the time. I don't want to buy a steptronic and regret it. Anybody out there who has driven both have an opinion? thanks