I'm tall, skinny and want a good 20 degree bag under 2 lbs. Western Mountaineering has the Ultralite; lots of good feedback and at 1 lb 15 oz for the tall its under 2 lbs. Feathered Friends has the Hummingbird nano which comes in at 1 lb 11oz for the tall and is minus the neck "thing" to help keep the warmth in. (Hey, some days I have a way with words and some days I no have way.) Anybody here with experience with the Hummingbird nano? For essentially the same price, I would not mind dropping another quarter pound if it seems worth it.