I am still in shock after I purchased the 2006 Z4 3.0i fully loaded with winter, comfort and sport packages for around $20,000 with 50k miles on it. I simply would have to search for a reason why buy anything else - including new, newer, or different model sport cars. With a push of a button this thing performs as if it had turbo or supercharged engine. The interior, though not Jaguar comfortable, hugs you tightly and holds you in one place to enjoy the show. Super tight sport suspension can take almost any corner at mind boggling speeds you can throw at it. Ditch the "run-flat" tires. Buy whatever you want at Tirerack.com for less than $500 and your car's shoes are back in order.
I have owned this car since October 2009. Bought it used with 36k. When I purchased it the channel changer on the stereo was not working. It was still under warranty. The dealership replaced the stereo with a new one. Other minor issues including front brake rotors occurred and the BMW dealership took care of them all at NO CHARGE. The warranty is the best. The car handles like a dream. It certainly is a head turner. I had a minor accident because of a blind spot when you look back to back up . I love this car. It handles like a dream and the dual steptronic transmission is terrific. I am a BMW customer for life. The customer support and service is the best I have dealt with.
I tested all of the competition (SLK 350, Boxster S, S2000, etc.), and I found the Z4 to be the best in class, especially considering the price. The Z4 has excellent power (and the sound of the I-6 is like tearing silk!), great fuel economy (averaging 26 mpg+ in mixed driving), tight, buttoned-down handling, plenty of room and great safety features.
I can’t believe this car! I haven’t had this much fun driving since I was 16. It's beautiful, turns corners like its on rails, and you can definitely getty-up and go with this engine. Invest in the 3.0si - you won’t regret it.
I bought my first Z4 in the spring of 2009. My wife and I argued as to who would drive it, so I bought another last fall. No doubt, fun to drive, scary quick, and either a head turner. BMW's reputation for service is second to none. I agree with many people here. If you want to get happy quick, go start and drive a Z4!