If you can’t spend much, take a look at this Mi-pac Backpack. It's a terrific product for a reasonable price. Another strong contender for your wardrobe is this Furla Backpack. While the price of this product is competitive, it will certainly attract a lot of attention.
If you're a bargain shopper, consider this Tory Burch Backpack. While the price is very reasonable, this product is an easy wardrobe update.
If you're not a thrifty type, then you absolutely must check out this JW Anderson Backpack. This product seems expensive, but it's top quality.