If you're a thrifty spender, this Plush Beanie will fit the bill. It's a great choice, while not very pricey. Another strong contender for your wardrobe is this The North Face Beanie Hat. While the price of this piece is not too high, it will surely attract a lot of attention. You might also want to consider this Knitted Hat. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're a bargain hunter, look no further than this Echo Beanie. This item doesn't cost too much, but absolutely deserves a spot in your wardrobe.