If you're after a thrifty option, you'll appreciate these Massimo Alba Slacks. It's a popular choice and a great investment. Another strong contender for your wardrobe is these Theory Trousers. While the price of this product is not very high, it will surely attract a lot of attention. You may also want to look at these Talbots Dress Pants. This item is not expensive either, but it will make a difference in your wardrobe.
For something in the middle of the price range, look no further than these Haider Ackermann Trousers. This item doesn't cost too much, but absolutely invaluable in your wardrobe.