If you can afford to spend a little more, we recommend looking at this Loro Piana Rollneck. While the price is very reasonable, this piece is an easy wardrobe update.
If you're willing to splurge, then what you're looking for is this Loro Piana Turtleneck. It's more expensive but worth your money. While you're at it, also have a look at this Loro Piana Turtleneck. Yes, this item is expensive, but it does not mean it's not worth it.