If you're after a thrifty option, your best bet is this M.Grifoni Denim Hat. It's a great piece, while not very costly. You can also consider this Penfield Hat. It's an item you're bound to love which also doesn't cost the earth. You might also want to consider this Beanie. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
For something in the middle of the price range, we recommend opting for this SuperDuper Hats Hat. While the price is very reasonable, this piece is an easy wardrobe update. You might also be interested in this John Varvatos Hat. It's an attractive option both price and quality-wise. Look at this Stetson Hat too! Great value for your money.
If you're gonna splurge, then what you're looking for is this Hat. It's more expensive but worth your money. Another product we're drooling over is this SuperDuper Hats Hat. It's pricey but you get what you pay for.