[FONT=Arial"]
Re : extras for the K-N. Soft closing for the tailgate (I suspect this will be std for M/Y `05).
Air suspension - improves ride quality but also allows you to drop the car by a couple of inches and improve both looks and handling.
Re: wheels I think the 19" alloys are a good compromise and may save you money on tyres (which you will be buying !!).
Servotronic steering - because it costs less than a training shoe.
Sat nav (PCM), fairly important - very hard to sell on again without.
Park distance control - not fortunes of money and will pay for it`s self with the first saved bumper repair.
A spare wheel. (The car only comes with a can of Jizz and a prayer mat). Either get the blow up job that fits in the Base bin hole under the boot carpet or go the whole hog and get the Lara Croft external spare wheel. Joking aside it does give you a full sized spare, we have it in case we get a flatty whilst towing.
An finally a tow hook. Even if you don`t use it you may just find it sells the car to someone when it come to re-sale. The Cayenne is currently the best tow vehicle in the world (Although I don`t think Porsche have realised it yet given that none of the UK dealers ever seem to fit a ball to their cars). Once the word gets out every Caravan clubber in the land is goint to be after one. (Again joking aside there are a lot of people who need a towing capability for their business but still want to enjoy performance and handling when not hooked up). The air suspension is a must for towing.
Oh - and finally finally Bi-xenon lights. Self levelling, clean themselves and a country mile better than the standard offering.
All the other fodder is really up to your personal taste. Things like the leather extending to the dash upgrades the feel of the cabin but at a price. It won`t make the car work any better. What ever you decide to fit enjoy your car when it arrives.
Henry