Thanks for the recommendations, everyone! I like the Tom Bihn bag, but I wonder if it'll be big enough, also the pretty colors are on back order

Now that I know what terms to google for (laptop sling bag) I'm finding some more options from Eddie Bauer, EVERKI, etc.

I'll have to try a few, I guess...

Still can't stop laughing about the Glock in the Maxpedition bag photo...