If you're not planning on spending much, why not take a look at this Lush Tunic. It's a terrific product for a good price. You might also want to check out this Volcom Tunic. It's an item you're bound to love which also doesn't cost the earth. You might also want to consider this Amuse Society Tunic. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you can afford to spend a little more, we've got your back with this Ming Wang Tunic. This product is likely to become a total wardrobe staple. It's also worth considering this Tommy Bahama Tunic. This item is ultra popular and, just as importantly, not too pricey. And do check out this Michael Stars Tunic! It's a very popular item and good value for money.
If you're willing to splurge, then what you're looking for is this Eileen Fisher Tunic. It's more expensive but worth your money. While you're at it, also have a look at this Tibi Tunic. Yes, this item is expensive, but it does not mean it's not worth it. Also check out this St. John Tunic. You won't regret the money spent!