If you're a frugal shopper, your best bet is this Peter Millar Zip Sweater. It's a wonderful product, while not very costly. Another strong contender for your wardrobe is this Vince Hoodie. While the price of this piece is not very high, it will surely attract a lot of attention. You might also want to consider this 2xist Crew-neck Sweater. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.