Not sure of the cheapest place to get them, but I love the way mine sound. I've heard them side by side with Epco's, and there is no comparison in my opinion. I guess it's more about what you're looking for though. The D&D's are LOUD (second only to Sceptres) when you get on them, but can be quiet when you need them to be. They have more of a low brap brap, whereas the Epco's are more of a vroom vroom kind of thing. I can't comment on any of the other brands.
