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!