Thank you all again for the comments and opinions!
I just received my backing fabric in the mail yesterday, and it's in the dryer now. I am putting the binding on another quilt before I will get back to the D4P's. Darn! now I need more batting! And I just realized, I've never quilted anything quite this large on my machine! I normally stick to the 45" size projects. I hope the 60" isn't that much more difficult to maneuver! Sure wish I had a Long arm!