I think I got all my bags are REI too! I have the light weight 35 degree Nooksak which is my go to bag, especially for summertime. And it zips up to my boyfriends bag. I also have a big Agnes that I love, but like Bubbletoes said, it's best for car camping, or maybe a quick overnight, it's very comfortable, but not really lightweight.
I have a winter bag, that is rated to 0 degress, but it is really big, bulky and heavy (don't recall the exact weight, but I think it's close to 4 pounds.
I use a silk liner sometimes too, and it does help with the temp rating, as does wearing clothes at night!
highest weight ever:202, SP starting weight: 143
New goal: 125 lbs, just to see what that looks and feels like! Hit it: Feb 2013!
H: 5''4" 49 y.o.
"Don''t let yesterday use up too much of today." Will Rogers
"Eat Food, Not Too Much, Mostly Plants" Michael Pollan
| current weight: 8.6 over