Currently the only bag I have is an REI PolarPod Lite Long. It's rated to 31 degrees according to the REI website although I haven't tested it that low. Not a bad bag for the price (I paid $50) but it is a little heavy for my wants at just under 3 pounds (47oz). I'm looking for a lightweight summer/fall bag or other sleeping setup. I'd like to stay under 2 pounds. Here are some options I've looked at.
Sea to Summit Spark SpI - 13.8oz - 46 degrees
Sea to Summit Micro MCII - 23oz - 36 degrees
Mountain Hardwear Phantom 45 - 20oz - 40 degrees
Mountain Hardwear UltraLamina 45 - 22oz - 43 degrees
MontBell Down Hugger 800 #5 - 22oz - 40 degrees
Sierra Designs Backcountry Quilt - 24oz - 30 degrees
Any thoughts on these bags or other lightweight setup they like (I'm open to quilts and blankets).