I'm 6`5 and have never had a bad night in my British Issue Arctic bag with Goretex bivi. They're an absolute beast! My only annoyance comes when waking up and having to get out of it! Or finding the adjusing cords doing their best to sneak down my throat! But sleeping in the open is all about insulating whats under you. Thermarest, wool blanket or a fwack load of leaves normally sorts that issue out.
Peace, out.
EDC/BOB sleeping bags?
Re: EDC/BOB sleeping bags?
I also have a Snugpak. Mine is shaped for the female form. This can be quite an issue for us ladies who are on the 'Rubenesque' side. 
Life isn't about waiting for the storm to pass, it's about learning to dance in the rain~anon