I don't know, Georg. My only comments are:
1) Any option you purchase "tommorow" will cost about 2-3 times what it will cost you "today" if you ordered it at the time of your initial factory order. Porsche charges a lot for Tequipment stuff and then the dealer wants money for labor.
2) Haven't you found any attractive 2005 left-overs within your budget? I would expect that you can get a better deal or better optioned car with the right 2005 purchase.
Good luck! I hope you are in your dream car soon.