If you're after a bargain, why not check out these Plush Tights. While the price is very reasonable, this piece is an easy wardrobe update. It's also worth looking at these Bootights Tights. This product is extremely popular and, just as importantly, not too pricey. And do check out these Spanx Tights! It's a very popular item and good value for money.
If you can afford to splurge, then what you're looking for is these Wolford Tights. It's more expensive but worth your money.