I have a HP Elitebook 6930P that I carry for my work laptop. Along with my laptop I also carry the brick power adapter, wireless mouse, lunch bag, 2 bottles of water, a notebook or 2, my med cafe bag, and occasionally an umbrella.
According to the laptop fit guide, it says I need the 3S vertical braincell (which I didn't see available) and it would fit in the Smart Alec or Brain Bag.
I'm not too worried about the braincell as I can get a cache to fit in the Smart Alec; or my other option is to get the horizontal braincell to fit in the Brain Bag.
I think the Smart Alec is the better choice for my daily load but would love to hear any other suggestions. The dimensions of laptop are 13.0" x 9.6" x 1.2"