Tomar Industries, N.J. International, or Oregon Rail Supply signals are practically the same. All are made of brass and are very good products.
For the controller, I use the Grade Crossing Pro circuit board from Logic Rail Technologies with across-track IR emitters and detectors. The Grade Crossing Pro will also control a bell and crossing gates, in addition to the flashing lights.
I have never used the Circuitron controller and cannot comment on its capabilities other than to say that Circuitron has a good reputation and their products all seem to be reliable..
http://www.logicrailtech.com