Looking for new Laptop Backpack (not programming related)

I am looking for a new Laptop Backpack for my 18" laptop since my 4 month old Laptop Case crapped out on me last week. I'm looking for a Laptop Backpack opposed to a Laptop Case because I have learned that carrying a Laptop Case around a college campus all day is not very practical.

Obviously, I am looking for something to fit my laptop and still protect it as much as possible. Something I can take on an airplane with me would be preferred. Money is not a concern to me.

Does anyone have any suggestions for me? I've been googling it, but have quickly realized I have no idea what to look for when choosing a backpack.

I personally have this one -

Wenger laptop backpack legacy

There is plenty of space for everything I need.
It may be a bit pricey though.. I suggest you take a look at some of the others on Amazon. :)