Of the three, the C4S has the best ***. The 997 will be more comfortable to drive, has a larger and nicer interior. I prefer the linear power curve, and after a short while, your brain will adapt to the turbo boost and it won't "feel" as fast if you use it as a dailly driver. So I'd go for a 997 GTS, which is what I did when I could have any one I wanted. Wide body, loads of HP and brain draining torque.