We love our Earthworks Pro program. We have used Paydirt, Carlson Takeoff, Agtek and Quest. (We own all of them too.)
EW Pro is so much easier to use than the other programs. It has proven to be as accurate as the rest. Our favorite features are:
1. Seeing both existing and proposed surfaces on one screen.
2. Ability to import a CAD drawing easily without using a 3rd party software like Terriblemodel
3. Awesome tech support we get when we call.