AER Go Pack vs Fjallraven Raven 28L Pack

These are going to be more suitable for ‘true’ one bagging (ie when you travel without a checked bag). If you decide to opt against a checked bag, perhaps look at a packable day bag and one of your options above, or take a look at the Peak Design Travel Bag, as this is designed with photographers in mind, is effectively a big bucket of a bag, and can expand from 35-45l (although I think when expanded to the full 45l it is slightly too big for most airlines). For a daily carry, you ideally want to be looking at something 25l or less, even under 20l.

Very durable with lots of convenient pouches and pockets for storage. My main complaint is it isn't quite wide enough to accommodate larger format laptops. I have a full size laptop with extended battery, and I can fit it in the bag, but not in the section of the bag designed for it. 2 inches wider and it would be perfect