If you're budget-restricted, take a look at this Denim Shirt. It's a great piece for a good price. Another strong contender for your wardrobe is this AG Jeans Button-Front Shirt. While the price of this item is not too high, it will definitely attract a lot of attention. You might also want to consider this Gracia Button-Up Shirt. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.