After driving Z4, Boxster, and S2000 I spent a good deal of time considering which I would be the best for my situation. Exterior styling on Z4 is good, interior and ride is rubbish. Boxster is the nicest drive of the 3, but at considerable running costs. The S is just fun, good looking and bullet proof. Engine note on Boxster is supreme. I actually plan on driving this car daily at some point and prefer to trade seldom. The Boxster is a bit better in every way except running costs and maybe steering speed / response. In short, Boxster cost is 2X up front, 3X to run, and lasts 1/2 as long. S wins on precise handling and overall reliability.