My Two Cents
I've got my ED coming up in January, I ordered a stripped model like you however I did decide to go with Fox Red Interior and the Carbon Leather trim. That's all.
Previously I was dead set on Speed Cloth, but damn I just love the look of the Fox Red with AW exterior and to me the Red really gives the interior a bit more charachter. That's just my opinion. I'm a big fan of E30s and I was always impressed when I saw white or grey ones with the Cardinal Red interior.
Price wise that sounds like a damn good deal especially since you are getting the holiday and the loyalty cash. Why not get the interior you want etc since you are getting such a deal.