Hello! I will soon be purchasing a Brain Bag for multiple uses-college, weekend travel, a three week trip to china, and some small backpacking trips. Based on this, does anyone have any suggestions for accessories to purchase alongside this bag? I am thinking about the packing cube backpack and the leads pocket for the guide pocket. I currently have an Outback sleeve from Waterfield Designs for my Macbook Pro(13") so I am not very interested in a Brain Cell. I am very curious to hear everyone's thoughts on packing cubes for the BB on weekend trips and weeklong trips. Thanks in advance for any help!