If you'd rather not spend much, why not opt for this Threads 4 Thought Hat. It's a wonderful product for a good price. Another strong contender for your wardrobe is this San Diego Hat Company Beanie. While the price of this product is not very high, it will definitely attract a lot of attention. You might also want to consider this Portolano Beanie. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're looking for a happy medium, why not consider this Hat. While the price is very reasonable, this product is an easy wardrobe update. In this price range, you can also take a look at this LABEL+thread Beanie. It's an attractive option both price and quality-wise. Consider this Portolano Knitted Hat too! Great value for your money.