If you're a thrifty spender, this Asos Beanie will fit the bill. It's a fail-safe choice, while not very pricey. Another strong contender for your wardrobe is this Hat Attack Knitted Hat. While the price of this item is not too high, it will certainly attract a lot of attention. Or you can choose this Asos Beanie - be sure you'll be making a stylish addition to your wardrobe.
For something in the middle of the price range, look no further than this Johnstons Beanie. This item doesn't cost the earth, but absolutely deserves a spot in your wardrobe. It is also worth looking at this Johnstons Hat. It's an attractive option both price and quality-wise.
If you can afford to splurge, then what you're looking for is this Markus Lupfer Hat. It's more expensive but worth your money.