The last couple quilts I made were with Warm+Natural. I do a medium density quilting. After they were washed they were super soft. The wool batting and silk batting are very light and soft, but I haven't used either one for a bed-size quilt.
I've been seeing so much super dense quilting on people's blogs like Quiltingismytherapy. I really wonder how those are for actual use. But they are intriguing...