If you're on a thrifty budget, your best bet is this O'Neill T-shirt. It's a great product, while not very expensive. In this price range, you can also check out this J.Crew T-shirt. It's also a popular item and won't break the bank. Or you can opt for this Emile et Ida T-shirt. This item has all the potential to become a powerful player in your wardrobe.
If you're looking for a happy medium, look at this T-shirt. While the price is very reasonable, this piece is an easy wardrobe update. Also check out this Il Gufo T-shirt. It's an attractive option both price and quality-wise. And do check out this Armani Junior T-shirt! It's a very popular item and good value for money.