backpacks

Decision: price aside, would people recommend the GPC Solo Ltd Ed Backpack, or the ThinkTank Airport Helipak Solo backpack? I need it as an airplane carry-on, so I'd like to be able to fit extra's in there (noise cancelling headphones, tablet, ultrabook, chargers, etc) and the 3DR backpack...

Just bought the Droneguard CS 400 last night at BB because I could get 25% off the price. Been looking for a YouTube video on packing the Solo inside but can't find any. I haven't tried to pack it yet. Anybody already have one and have suggestions?