To the poster in London with the Ext. BB leather quiry:
The Anthracite helps the transition from beige to the black dash board because of the speckling in the detail of the wood trim. I don't know that the extended beige would look as seamless up against the silver trim or even the carbon fiber trim...but the design of the interior is beautiful...so even if you are holding your breath and waiting to see your choice IRL...there is no chance you'll be dissapointed.
I wasn't sure myself about the SSII with BB...but once my ass hit that bucket seat, I was all smiles...and you will be, too.