Mike Walsh wrote:What is a good decoder for the Athearn locos?
It depends on the loco...
Mike Walsh wrote:I noticed that the light boards seem to look like NCE mockups, for analog.
Actually, NCE (and others) make their decoders to be a direct replacement for manufacturer boards, not the other way around.

Mike Walsh wrote:I would like to go ahead and put decoders in these, but would like to think about putting sound in these someday, so affordability would be a plus here. BTW, the locos are an Athearn Gensis SD75m, another is a SD75I
It looks like you can use an
NCE DA-SR or
Digitrax DH163A0 decoder. If you end up putting sound in it later, you can either add a sound-only add-on decoder or just replace the decoder with a sound/motor decoder.