If you're a frugal shopper, this Woolrich Turtleneck will fit the bill. It's a foolproof choice, while not very costly. Another good option is this Tibi Rollneck. While the price is not very high, be sure that this piece will become a wonderful addition to your wardrobe. You may also want to look at this Liz Claiborne Turtleneck. This item is not expensive either, but it will make a difference in your wardrobe.
If you're looking at it like an investment piece, then you absolutely must check out this Chloé Turtleneck. This piece seems costly, but it's top quality. While you're at it, also have a look at this Saint Laurent Rollneck. Yes, this item is expensive, but it does not mean it's not worth it. You might also want to take a look at this Vanessa Bruno Rollneck. You won't regret the money spent!