An X5World member was nice enough to let me come look at his car last night. He has the truffle interior with Anthracite wood, and the combination was just perfect. I didn't think the Anthracite would go with Truffle, but it matches perfectly. The darkest parts of the Anthracite are of course black which matches the black interior, and the lightest parts of the Athracite wood are a brown which is very close to the Truffle Brown color. So the Anthracite really blends well with the black interior and the Truffle seats. I placed my order this morning.