if you're in a thrifty mood, this Elizabeth and James Vest will fit the bill. It's a great choice, while not very costly. Another strong contender for your wardrobe is this Helmut Lang Waistcoat. While the price of this piece is rather reasonable, it will definitely attract a lot of attention. You might also want to consider this Yigal Azrouel Vest. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.