I have been using a Boblbe laptop backpack for a couple of years to carry my PowerBook and assorted gear. I have tried the Axio on and I think the Boblbe is more ergonomically shaped.
http://store.yahoo.com/advancedtechnologygear/peoplesdelite.html
Also, it's been around for a while, so you can find it at a discount, and they have more colors to match the bike or helmet, if you are into that.
http://store.yahoo.com/advancedtechnologygear/peoplesdelite.html
Also, it's been around for a while, so you can find it at a discount, and they have more colors to match the bike or helmet, if you are into that.