If you're looking for a happy medium, why not consider these Bloomingdale's Running Pants. While the price is very reasonable, this piece is an easy wardrobe update. You might also want to check out these Nike Leggings. It's an attractive option both price and quality-wise. And do check out these Leggings! It's a very popular item and good value for money.
If you're willing to splurge, then what you're looking for is these Paige Skinny Jeans. It's more expensive but worth your money.