if you're in a thrifty mood, your best bet is this Muun Tote Bag. It's a fantastic product, while not very expensive. Another strong contender for your wardrobe is this Tory Burch Tote Bag. While the price of this piece is rather reasonable, it will definitely attract a lot of attention. You may also want to look at this Rebecca Minkoff Tote Bag. This item is not expensive either, but it will make a difference in your wardrobe.
If you want to treat yourself, then what you're looking for is this Thom Browne Tote Bag. It's more expensive but worth your money.