I purchased Quilting With Templates with Kin Brunner and I loved it. It is a very good class showing you ins and outs of quilting with rulers, marking your quilts etc. Worth every penny. And yes, i did buy her rulers because i find them exxeptionally helpful and very versatile. Although there are some benefits gor all quikters, this class is the best if you have a LA machine or a DSM on a frame.
I also took 2012 BOM which is great especially considering that it is free. In the beginning, It is not on a professional level as the paid classes, but it does get there. It was good never the less. Great quilt project.
I am taking 2013 BOM and so far I am liking it. The instructor is very good and has many great tips which are new to many and helpful refreshers for others.
I am eyeing Angela Walters courses. I have her book so I am not sure how much overlap (if any) is there. Good luck!