If you're not planning on spending much, this Emile et Ida T-shirt will fit the bill. It's a great choice, while not very expensive. Another strong contender for your wardrobe is this J.Crew T-shirt. While the price of this product is not very high, it will definitely attract a lot of attention. You might also want to consider this Ralph Lauren T-shirt. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you can afford to spend a little more, look no further than this Junior Gaultier T-shirt. This item doesn't cost too much, but absolutely indispensable in your wardrobe. In this price range, you can also check out this Moschino T-shirt. It's an attractive option both price and quality-wise. And do check out this Zadig & Voltaire T-shirt! It's a very popular item and good value for money.