I have the Autopage two way LCD pager installed. Model 855 FM. I works GREAT! Distance is either 1000 or 2000 feet i forget.

Go to their website and check it out.

No complaints here. It has many different features, i am sure like the rest of the other ones. I guess it would boil down to, what your needs are. I had a pro install it. I did not want to mess with the wiring.