I use the BBP lime one, cause it's A. The best laptop bag I have ever used, and B. if you don't mind the color, it's on super clearance for 40$. Best bag imo, protects well, has a seperate well padded compartment foe the macbook, and space to carry plenty else. Also very comfortable to use. Converts between backpack and messenger mode. Sits low, comfortable on back and I haul my macbook pro 13 + books about 1-2 miles each day.
If money is no object, then they have the full price hamptons version in black and other more stylish colors for like 100$