The Nardo choice is a marmite colour, it seems to appeal more to the male car enthusiast market rather than the general population. I've found a lot of people just don't get it, say it looks a base primer, cheap and unfinished and is nowhere near as special as the Sepang colour. Overall, I would say general opinion from friends/family/work colleagues has been a 50-50 love/hate on the Nardo and a 75/25 on love/like on the Sepang. Not that any of the matters, it's my choice, it's just good to know what general opinion is.
Spec would be the full black optics/privacy/black wheels on either the Sepang or Nardo for me. I just think the dark look suite the RS6 and adds to the aggressive wide stance of the car. I'll probably change the Audi rings front and back to black/CF too
Anyway, I still have a couple of weeks before the order is locked down and I hope to get to see a Nardo car up close and in real time before I put this one to bed. The Nogaro pics look really good but I suspect a special order and thus an expensive add on. Looks really good though

Cheers for your input.
With reference to discount, I believe Audi finance contribution is £6k, anymore is dealer (it seems to suggest this on the online Audi finance calculator anyway?)
I have two good quotes, 13.6% from Hatfield Audi and 13.7% from my own dealer here in Aberdeen. (Some say Aberdeen is usually a hard place to get a good discount due to the oil industry but I'm sure there's a loyalty element as it will be my 8th purchase since 2009)