For something in the middle of the price range, check out this J.Crew Off Shoulder Top. While the price is very reasonable, this piece is an easy wardrobe update. Also take a look at this J.Crew Tunic. It's an attractive option both price and quality-wise.
If you want to splurge, then what you're looking for is this J.Crew Tunic. It's more expensive but worth your money. While you're at it, also have a look at this J.Crew Blouse. Yes, this item is expensive, but it does not mean it's not worth it.