help deciding lazer flex 30 or arrow rock 30 bag?

hey guys, i'm looking for some help deciding between the two:

sierra designs arrow rock:
Specification Description
Comfort rating 30 degrees Fahrenheit
Comfort rating - celsius -1 degrees Celsius
Average weight 2 lbs. 5 oz.
Average weight - metric 1.05 kilograms
Shell Polyester
Fill 600-fill goose down
Lining Polyester
Fits up to 6 feet
Shoulder girth 57 - 65 inches
Hip girth 53 - 61 inches
Stuff sack size 7 x 17 inches
Shape Mummy

sierra designs lazer flex:
Specification Description
Comfort rating 30 degrees Fahrenheit
Average weight 2 pounds
Shell Polyester
Fill Synthetic microfibers
Lining Polyester
Fits up to 6 feet
Shoulder girth 53 - 60 inches
Hip girth 50 - 57 inches
Stuff sack size 8 x 18 inches


just wondering if anyone has used any of them or know anything about them? the lazer flex is about 20 bucks more expensive.

thanks for the help!

add one more bag to this discussion:

North Face Cat's Meow
Specification Description
Comfort rating 20 degrees Fahrenheit
Comfort rating - celsius -7 degrees Celsius
Average weight 2 lbs. 10 oz.
Average weight - metric 1.19 kilograms
Shell (Top) 57% polyester/43% nylon / (bottom) nylon
Fill Polyester fibers
Lining Nylon taffeta
Fits up to 6 feet
Shoulder girth 62 inches
Hip girth 58 inches
Stuff sack size 8 x 17 inches
Shape Mummy