If you're looking for something in between pricewise, check out these Theory Fitted Pants. While the price is very reasonable, this item is an easy wardrobe update. In this price range, you can also take a look at these Theory Slim Pants. It's an attractive option both price and quality-wise.
If you can afford to splurge, then what you're looking for is these Theory Slim Trousers. It's more expensive but worth your money. While you're at it, also have a look at these Theory Skinny Pants. Yes, this item is expensive, but it does not mean it's not worth it.