I have the grace model that will accomodate up to a queen size and I like it very much. It has a roller to hold each the top, backing and batting as well as a take-up roll. It also tips to adjust the angle your quilt is on and therefore I can adjust it so that my chair and knees are under the quilt and I can easily reach the quiltable area. Good luck with your search.
I ordered mine directly from the Grace Co. online. Sometimes I think there might be better deals on other sites.