Considered WM bags, but their weight-to-warmth ratio made them too heavy IMO.
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Joe,
I am curious about this. I have 3 WM bags: A Kodiak, which(for me) is good to about -5*F and weighs(my scales) right at 3 lbs. I also have a Puma which, on my scales, weighs in at 3 lbs 14oz, which I have taken down to the rated -25*F with no issues, and finally, an Alpinlite, which I haven't weighed, but does great down to the rated 20*F.
These seem like pretty good numbers to me.
What do you use, if I may ask?
EDIT: I forgot to mention that all these bags are 6" in length.