With that budget, consider taking a look at Peak Design’s Everyday Backpack. It’s a different style than you’re used to, but it hits all the boxes, and looks sharp. They
excell at better organization. But because they are slightly rigid, textbooks might weigh a bit weird if you have too many.
We have an everyday V2, totepack and two 30L travel packs, all highly recommend.
12 or 13 years? Don’t really remember or care!