Big Agnes Lost Dog 30
"This is an excellent bag. I had it out this weekend in 37 degree nights. Worked outstanding. I'm a broad guy and I got a long. This gives me a lot of room around the chest and legs. I am also a side sleeper and its still roomy when trying to sleep. Overall, its not too heavy and kept me warm when paired with a big Agnes insulated pad. I highly recommend this bag. On a side note if you can spring for the 15 degree bag do it, It will give you a little better range of temps to work with, but that's my 2 cents. If it gets closer to that 30 degree mark add some layers on or a sleeping bag liner and you will be comfy enough to sleep well."
