Or satchel, messenger, whatever you'd like to call it.
Basically a one pocket slim leather satchel that will fit a thin 15" laptop.
I will mostly only carry the laptop with me, perhaps along with a book on the odd occasion. $500 max, maybe $700 if it's that amazing.
Will be worn with denim and casual shirt, so fairly nothing too formal.
This is the bag I've been searching for, they've gone out of business:
Any suggestions? There was a Billykirk Schoolboy bag that...