Thanks guys for all the feedback.
Today I drove the 3.0d (having tried the 3.0sd last week) bottom line is I was a lot more impressed with the 3.0d than I thought I would have been.
Bearing in mind the incredible deal I got from my dealer against the aditional cost of going for an stock SD which would include 20", 7 seats, HUD/sunroof I've gone with the 3.0d. Unfortunantly there were no SD with the same spec as the 3.0d therefore would have cost a lot more.

I think I'll be happy!