I wouldn't want to take my 10 degree bag to 10 degrees though.
EE's Enigma and Revelation quilts both come in 0 degree versions. They should be good down to 10 or 15. If it gets colder than that, my camp trailer looks pretty good. The Revelation has the advantage over the Enigma in that the foot opens up into a flat blanket. That would be useful in warmer weather.
