What is the best pillow to use for this...
What is the best pillow to use for this bag that is comfortable and big.
Two unrelated items. A pillow that's comfortable and big will work with any sleeping bag. Take a look at the WM Cloudrest (http://www.backcountry.com/western-mountaineering-cloudrest-down-pillow) and the large Thermarest Down PIllow (http://www.backcountry.com/therm-a-rest-down-pillow).