Does anyone have a recomendation as to what sound decoder one could use for a N-scale Con-Cor M-10000
Have you asked Con-Cor? They have a web site and a member of our local club is their DCC guru. If anyone makes a decoder, they should know.
http://all-railroads.com
For N scale, MRC may be the only choice, but you'd probably be better off without sound if they are the only one.