If you're budget-restricted, why not opt for this Asos Tank. It's a great item for a reasonable price. Another strong contender for your wardrobe is this Lira Tank. While the price of this product is not very high, it will certainly attract a lot of attention. You may also want to look at this Private Party Tank. This item is not expensive either, but it will make a difference in your wardrobe.
If you're looking for something in between pricewise, consider this d.RA Tank. While the price is very reasonable, this item is an easy wardrobe update.