My son is going to be starting school and I want to get him a nice backpack that will last 2 years or so. I want something with out a kids theme. I was looking at LLBean, the original plus. I am also looking at a wasabi Jansport one at Kohls. Are either of these to big for him? Kohls would be nice because of the 30 % off, but really the pricing is very similar. Any thoughts?