Because I love a traditional look of my quilts I prefer Hobbs Heirloom 80/20 or Legacy 80/20, also cotton battings like Legacy or the Tuscany brand. They are all wonderful for hand quilting.
If you want to have a more puffier look you can use wool - it's also great for hand quilting.
I avoid all battings with a scrim, it's too hard to needle for me.