mh phantom 15 vs rei sub kilo?

both companies have a women's version this year. i'm in the market for a 15* bag. i own a rei kilo plus, and very much like the bag -- -it's a good value and lt. wt. for a zero*. i've heard some mixed reviews on the sub kilo though, and would love to hear from sub-kilo users. the sub kilo weighs a little more than the mh phantom, and the phantom costs about $100 more. $ isn't the tie breaker though, a good value and accurate temp rating are more important. (oh, the phantom has 800 fill and the sub kilo 700 fill). i am also open to suggestions on other bags. i know western mountaineering and feathered friends have very good reputations. thanks.