I thought the current gen looks a little too "bulbous", if that is an accurate description. Still, it is attractive. And still very rare. Interior wise, it is very nice and upmarket, but very marred by the dated COMAND system. Driving characteristic wise, after test driving the CLS550 and now my current 550i, it was very similar. MB had really upped their game with dynamics with that car. Still, just like the 6GC costs much more than the CLS, the CLS costs more than the 550i with a similar mix of features.
ED on 7/18/2014: 2014 550i, Space Gray, Mocha. M Sport, Cold Weather, DAP, Executive, Lighting
PCD on 9/6/2011: 2011 550i, DSB, black/oyster. Prem 2, Conv, Ventilated, HUD, Sport, DHP, SAT