If you're not planning on spending much, this Prana T-shirt will fit the bill. It's a popular choice, while not very pricey. In this price range, you can also check out this Vans Tank. It's also a popular item and won't break the bank. You may also want to look at this The North Face Tank. This item is not expensive either, but it will make a difference in your wardrobe.
For something in the middle of the price range, we've got your back with this Lacoste V-Neck Tee. This piece is likely to become a total wardrobe staple. You can also check out this Lanston Tank. It's an attractive option both price and quality-wise. Alternatively, opting for this Long Sleeve T-shirt is a wonderful choice as well!