I went for a test in a 2006 Cayenne Turbo with less then 15000 miles for $30,000 less then sticker and then a 2008 which was priced at $108,000. The 2006 seemed faster then the 2008 even though the new 2008 has 500 HP vs. 450 HP in the 2006. Since my 4.8is has been at the dealer for 19 days I thought I would look around. The Cayenne was fast and had a fantastic interior but I still can't understand the price difference from my old Touareg. I can't wait for the new X5 is!