Has anyone used a Ranchero, Backbone, Dually backpacks. they seem pretty cool but I would like to know if someone has had personal experience with these backpacks. I'm thinking about a case for my upcoming 17" purchase but not sure which direction to go. Im a photographer and as much as I like the timbuk 2 bags as well as the Chrome and other messenger style bags I'm worried that it might not look to professional. I also want to have some storage room for PDA camera etc. as well as an easy way to get to them. so I don't think a briefcase might do the job. Any suggestions.