I think most of the SG packs would be sort of frustrating as a travel pack. Hard to say what level of backpacking they'll be doing, so it makes the recommendation tough.
I had an osprey porter 46 (
https://www.osprey.com/us/en/product/porter-travel-pack-46-PORTER46F20.html) that was on the other end of that spectrum. Great travel pack, but not much of a backpacking pack. I miss having it for travel, but I was trying to make it into a work pack and it just wasn't that. Something to think about.