Have you seen this specific version of Matt & Nat, Anna? Personally, I'm not very fond of their newer finishes (looks more plasticy than others), but the La Roux is a fun awesome bag. Last year they had a finish called Stellar, which was more distressed looking (I also like the Hendrix and Santogold Stellar clutches, they could still be available online).
I like your taste I really like all the LAMB bags mentioned, especially the Montfort and Brigitte. It's hard to decide without knowing more about the recipient. The Brigitte can fit lots of things inside, so it could even be used as a school bag of sorts. The grey is a super color. The Montfort is adorable and the detailing makes me drool, but it's canvas, so I don't know. I'm kind of stalking the larger version of that bag. Actually I like the other two LAMBs as well, so in fact I'm of no help whatsoever.
I would have loved to have a stylish style mentor like you when I was that age. And to have any of those bags.