The lowepro vertex 200 aw would fit what you are looking for or the thinktank airport acceleration backpack holds more. below is a review of both, hope it helps.
The Vertex 200 backpack is rugged and well thought-out. It looks waterproof, although I wonder how the newfangled waterproof zippers will hold up over the years. I like the waistband and shoulder straps: the harness system offers good support for hiking with minimal equipment. It has good straps for attaching a bigger tripod too.
I normally use a
Thinktank Airport Acceleration backpack, which, in addition to the equipment listed above, holds a 70-200mm lens, a 100 macro, and an infared remote receiver and trigger. The laptop slot is less padded than the Lowepro, and the harness system is not as good. I would take the Thinktank for transporting gear at airports, taxis and for moving fragile equipment around. The Lowepro would be better for backpacking and rougher assignments where I need fewer lenses.
hope you find one for him, is a great idea for a present :) x