If you're budget-restricted, this Tumi Backpack will fit the bill. It's a foolproof choice, while not very expensive. In this price range, you can also take a look at this Tumi Backpack. It's also a popular item and won't break the bank.
If you're looking for an item in the middle of the price range, look no further than this Tumi Rucksack. This item won't break the bank, but definitely deserves a place in your wardrobe.