I just ordered a refurb blackbook today and want to get a carrying bag for it. I want something small but with space for a power adapter and maybe a mouse. Most of the small bags that I have seen are basically just sleeves (like the Brenthaven Edge) that only have space for the laptop itself. Is there anything fairly small and light that still has some extra pockets for extras? I don't want anything big like a backpack or messenger bag.