Like Rossi, I am still not wild about the looks, but they are sure getting better. And the 540HP is enticing. The Turbo S version--sure to come in year or so--will be tempting.
Every time I accelerate strongly in my Cayenne Turbo S, I marvel at the V8's power (550HP)and smoothness and think about what it will do for the Panamera.
As an aside, though, I admit I am getting quite comfortable sitting higher up in the Cayenne, after decades of sitting in 911s and 356s. I do notice how much lower I sit in a Panamera, and that the rear view out the back window seems constricted. Guess its age (68 next week) and laziness, but c'est la vie...