I am exploring this same subject. When Fabric Depot and Connecting Threads had their batting sale on, I ordered Quilter's Dream, Hobbs 80/20, and Warm and Natural.
I am on the last legs of quilting a queen with the Warm and Natural batting. So far, I like it. I haven't used the others yet, but since I'm keeping all three quilts for my own beds, I'll be able to compare.
I have used Mountain Mist on some lap quilts and they seemed to quilt just fine...however, when sandwiching the quilt, it seemed like it pulled apart very easy and was thinner in some places than others. But when quilted, the whole thing didn't come out thinner in places...don't really know what was going on there. <scratching head>
Dray