It doesn't sound like it would work for your particular situation (as it doesn't have multiple compartments or anything) but I love my GoLite Ion pack. It's just a lightweight tube of a pack with great shoulder straps. Once I cut off the cheap hipbelt, it's almost the perfect pack. It's very lightweight & as long as I don't pack it completely full, it seems to bend enough that I don't really get a very sweaty back, only a few small spots.