I like McCalls Quilting the best. McCalls Quick Quilts is good too.
I also subscribe to Quilter's World, Better Homes and Gardens American Patchwork (what a long title) and also Fons and Porter's Love of Quilting.
The McCalls always has more earmarks when I'm done reading it, which is a good indication. (I've actually stopped earmarking, now I use sticky notes with the pattern name written on them) Makes it a whole lot easier to find what I'm looking for that way!