If you don’t want to splurge, your best bet is these J.Crew Tights. It's a terrific piece, while not very expensive. You might also be interested in these Tights. It's a product you'll love which also doesn't cost too much. You might also want to consider these Hue Tights. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're looking for a happy medium, take a look at these Plush Tights. While the price is very reasonable, this piece is an easy wardrobe update.
If you have enough to afford it, then what you're looking for is these Balenciaga Tights. It's more expensive but worth your money.