It ended up being 72x83. Not too shabby for a big lap quilt. I think I know how I want to quilt it. I'll give it a go. Oddly enough I'm planning to use a lavender colored thread to do the top stitching. The backing is a mottled black so it's definitely getting black for the bobbin thread.
Speaking of points... so if that is the bottom right of the quilt, want to know what the dead center looks like? It's actually really kind of cool.