i have been using the storm 3600 from kelty and have been very happy with it. i do not know what size you are looking for or its intended purpose, but for a multi day pack that is tough and waterproof it works well i upgraded to this pack from an old military surplus wich also worked well. i wanted something with a hydration bladder
Size: Regular
Torso Fit Range: 12 - 18" / 30 - 46 cm
MSRP: $145.00
Usage: Backcountry
Suspension: Internal adjustable
Specifications:
Volume: 3600 in3 / 59 liters
Weight: 4 lb. 3 oz. / 1.9 kg
Dimensions:
Length: 34" / 86 cm
Width: 16" / 41 cm
Height: 12.5" / 32 cm
Materials:
Body Fabric: 210D nylon mini-shadow ripstop
Reinforcement Fabric: 600D polyester kodra and 500D nylon kodra
Packbag Features:
Three-liter Taste-Free™ hydration system included
Daisy chain
Reflective accents
Ice-axe loop
Outer mesh stash pocket
Security pocket
Side compression straps
Top-panel loading
Shovel pocket
Mesh water-bottle pockets
Lash tabs
Load compression strap
Spindrift collar
Reservoir sleeve
Suspension Features:
Breathable backpanel with Spacermesh
Sternum strap
Adjustable suspension
Padded two-layer shoulder straps
Belt stabilizers
LightBeam™ aluminum stays
HDPE frame sheet
Load-lifter straps
Scherer Cinch™ (US Pat #5,465,886)
Padded three-layer waistbelt