If you are on a limited budget, this Scala Flat Cap will fit the bill. It's a fail-safe choice, while not very expensive. Another strong contender for your wardrobe is this Outdoor Research Newsboy Cap. While the price of this product is not very high, it will surely attract a lot of attention. You might also want to consider this Brixton Flat Cap. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
For something in the middle of the price range, look no further than this Hat Attack Driver Cap. This item doesn't cost the earth, but definitely deserves a place in your wardrobe. It's also worth taking a look at this Fisherman Cap. This product is extremely popular and, just as importantly, not too pricey. And do check out this Hat Attack Newsboy Cap! It's a very popular item and good value for money.