Randy,
I had mine upgraded to EOB back in the day and it I have it on my layout currently. It runs great with an AtlasO Dash-8 also with EOB. Upgrading it with an ERR Cruise Commander would be pretty easy except you would lose the flashing lights as ERR doesn't have the capability of running those (you can just have them on or off depending on how you wire them up).
Here is an older video of my upgraded Santa Fe SD75 (my train has grown since I took this video):