If you are on a budget, this Gosha Rubchinskiy Belt will fit the bill. It's a foolproof choice, while not very costly. Another good option is this Y-3 Belt. While the price is rather reasonable, be sure that this product will become a wonderful addition to your wardrobe.
If you're looking at it like an investment piece, then you absolutely must check out this Givenchy Belt. This piece seems pricey, but it's well worth it. Why not take a look at this Alexander McQueen Belt too? Expensive, but worth every penny.