>>I think he was (kinda) kidding about the Nemo. I hope. Although it does look really comfortable.
Dude, the Fillo has memory foam in it! That's not a joking matter.
There's no such thing as an UL pillow. Just lame, frustrating half measures. If you want a pillow, carry the weight of the Fillo secure in the knowledge that you have, in fact, a pillow and not an over glorified balloon. Otherwise, use your pack, or socks, or Platy, or elbow, or rocks, or bark. Whatever. Better yet, be a masochist and don't use anything.
Just don't say you want an UL pillow. Next thing you know, you'll want someone to show up and pitch your tent and put a chocolate on your UL pillow before you turn in at night. At which point I think you should just stay in bed at home full stop.