If you're looking for an item in the middle of the price range, we recommend checking out this Hanro Tank. While the price is very reasonable, this item is an easy wardrobe update.
If you're looking at it like an investment piece, then what you're looking for is this Carven Tank. It's more expensive but worth your money. Another product we're drooling over is this J.Crew Tank. It's expensive but you get what you pay for.