I can't weigh in on the Airborne brand - no experience with them.
You won't be going wrong with any of those big brands you mentioned in your original post (Giant, Trek, Specialized, Marin).
None of them will break off a jump. But I would reconsider the whole 29er thing, they're typically slightly more expensive than their 26er siblings, as some companies are still putting research into the geometry and only a very select few have actually 'nailed' the geometry.