If you're in a thrifty mode, consider this Sole Society Carryall. It's a great item for a reasonable price. Another great option is this Herschel Carryall. While the price is competitive, be sure that this item will become a great addition to your wardrobe. You might also want to consider this NO KA 'OI Duffel Bag. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're not the one to skimp on clothes, then what you're looking for is this Holdall. It's more expensive but worth your money. While you're at it, also have a look at this Saint Laurent Duffel Bag. Yes, this item is expensive, but it does not mean it's not worth it. And one more item you might be interested in is this La Perla Holdall. 'Cause you deserve nothing but all the finer things!