Questions on interior colors and seats

[copasetic222]

I'm thinking very seriously of coming over from the dark side ('09 Cayenne Turbo S) to an X5M. I have some older M cars that I really enjoy, my wife has a new X5 diesel and the new Cayenne is not for me for many reasons.
I'm also considering a 750i XDrive, but, today anyways, I'm leaning to the X5M.

I have some questions on interiors. Is anyone familiair with the silverstone interior? How does it look? Is it a real light grey? Some light greys are rich and some are boring. How would you describe this one?

What about the Bamboo Beige? Can anyone compare it to the Oyster interior in the 750's, I'm familiar with that color and would describe it s taupe.

Seems like carbon leather is the most prevalent trim choice. Any experiences with piano black or the red brown grained wood?

If I am looking at the "build your own" feature on the bmwusa.com website correctly, the perforated seats only come in silverstone, bamboo or black. And, the multi-contour seats only come in a package with seat ventilation.
I am very tall and need the multi-contour seats, so if I am correct my interior color choices are limited.

Also, does anyone know if the top of the multi-contoured seats articulate front to back like the luxury seats in the 7 series do? At my height, that extra adjustment is very helpful.

Sorry about all the questions; thanks for your help.