If you're looking for a thrifty option, this MCQ Carryall will fit the bill. It's a foolproof choice, while not very costly. Another strong contender for your wardrobe is this Karen Walker Carryall. While the price of this product is not too high, it will surely attract a lot of attention. You might also want to consider this Milly Duffle Bag. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you can afford to splurge, then you won't be disappointed if you check out this Louis Vuitton Carryall. It's an expensive but smart option. While you're at it, also have a look at this WGACA Duffle Bag. Yes, this item is expensive, but it does not mean it's not worth it.