I believe the Porsche hierarchy should be:
928- Three door coupe based on Panamera with a 5.0 litre V8/V10 engine
Cayman- WITH the power it deserves. It is definitely a better car than the 911 and if Porsche were to choose to realise its true potential, it would eventually rise above the 911
911- An iconic car, true. But there is only so far you can develop a design that is conceptually flawed and decades old. They have tried to iron out the flaws over the years, true and sure, one can be obstinate and choose to make pigs fly if one is so inclined, but a flying pig is no Concorde.
The commercial models, the Cayenne and the Panamera do not really matter and should be considered as necessary only to provide funds to develop the sports cars...