If you're not planning on spending much, your best bet is this Kimono. It's a terrific piece, while not very expensive. In this price range, you can also consider this Vikki Vi Kimono. It's also a popular item and won't break the bank. You might also want to consider this Capelli of New York Kimono. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're not a thrifty type, then you absolutely must check out this Fuzzi Kimono. This piece seems expensive, but it's worth it. Why not take a look at this Michael Kors Kimono too? Expensive, but worth every penny.