The Simmons atec is definetly a great choice. I have had one for a number of years and it has performed perfectly.

Having said that my choice would definetly be the Burris FF2. It is by far the better of the three. Even though I have just learned they are assembled int he Philipines.[] They are fully multi coated, one piece tube, and a plethera of other features that I would prefer to have.