Thanks for all of the advice.
The MRC AH-501 would be my dream transformer. But, at $400 plus, I may have to wait well into the future to be able to get one.
This leaves me with the LW and KW. I have looked at both of these in the past and really like them, except for the no-horn/bell button issue.
Here is my question please: When I go online and search, I see sales of Control Buttons for horn/bell feature, for O gauge trains. They just look like a red button in the middle of a small black plastic pad. But, if I want to go this route, is this Button the only thing I have to buy and hook up into my system? Or, are there other units, wiring, accessories I would have to buy to implement this feature.
Thanks again,
Mannyrock