Is anybody using this backpack to carry photo equipment and laptop? I'm looking around for a good case, small enough to carry inside the plane cabin, but large enough to carry 15.6" laptop, couple DSLR with lenses and half a dozen of spare lanses, batteries, chargers, etc. Here is what I'm thinking about so far. It looks better than ACPRO1800 since this one can hold my laptop, but ACPRO1800 can hold only a 14" laptop, which is not enough. I'm curious is there any other afordable choice to carry this stuff?