We’ve said it before, and we’ll say it again: STM makes great bags. At least one of our editors is particularly fond of its vertically-oriented computer carriers, so we were excited to see the introduction of the Velocity line, and with it, Linear Small Laptop Shoulder Bag ($65) and Linear Medium Laptop Shoulder Bag ($70). The former fits up to a 13” MacBook, and the latter, 15” machines. You have your choice of red, black,…