Maureen NJ

I have had Wm Morris fabrics for a little over a year and have been trying to decide on a pattern where I can showcase the fabrics. They are green, blue, peach, tan, rusty red prints that I do not want to cut into small pieces as the large prints are beautiful. I have decided on the following pattern based on the purple one I saw here on the QB. Thanks so much for all your help.

My questions are:
1. Did I figure it correctly that a 9" square is 12.75" on diagonal? I want to make a king size quilt.
2. With all the solid blocks in the drawing being different colored prints, on the border 9 patch (made up of 3" squares), should I do the print blocks IN EACH BLOCK in one color or make it scrappy?
3. I was thinking of using an off-white or beige solid for the white blocks and using wool batting. Does wool batting come in just natural or can you get it white?

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