batts without scrim are best for hand quilting- the scrim is what makes it hard to stitch through.
hobbs has many very soft fine nice batts-
the 'dream batts' are also wonderful and those the poly, cotton, wool and silks are all just wonderful to stitch!
but the hobbs is probably the ones you should be looking for, they are wonderfully soft, in many lofts and (made for hand quilting) hobbs heirloom 80/20 is a great one and easy to find- inexpensive