The Maxi Roughstack is going to be the best price wise and other ways as well depending on your goals. A durable, tuff mod which isn't the flashiest thing around, basically a plain looking steel pipe. That's what I like about it though, don't have to worry about dinging it up or scratching it, just adds to the character.
If you're looking for a more refined looking mod you'll need to up the price and let us know a budget.