My boss is a porsche guy and has a turbo panamera as a daily driver and a 4 GTS as his toy, his wife has a cayenne. I drove the panamera and it is a crazy drive, don't think the turbo would be worth it for a daily driver, having driven it a few times I would say for a daily driver I would spend half the money and get something that has more than enough power and handling. I must say the PDK is a great transmission, faster with better mpg, and it is obviously bulletproof since they use it in race cars and in production cars with far more HP than what you are looking at. If I were to buy a car I would go that way, sure there is no clutch but try it out a few times and you probably will be a fan.
My wife wants an SUV, I am a fan of diesels so with the Cayenne coming out with a diesel I will at least look at it. However, depends on the price point...a Toureg would provide better bang for the buck in a similar package.
My neighbor has a GT2 RS which I must say is pretty much my dream toy...then again his Bentley that he just put snowtires on it might be even more fun this time of year in Chicago land. Guy is my hero, he has half a million in cars and his wife drives a Ford Edge...I dont think I could get away with that one.