If you are on a limited budget, you'll appreciate this Neiman Marcus Turtleneck. It's a great choice and a great investment. Another strong contender for your wardrobe is this Vince Turtleneck. While the price of this item is rather reasonable, it will certainly attract a lot of attention. You might also want to consider this Uniqlo Turtleneck. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're gonna splurge, then you absolutely must check out this Veronica Beard Rollneck. This item seems costly, but it's worth it. Another product we're drooling over is this Chloé Rollneck. It's expensive but you get what you pay for.