I use Legacy, and with the correct equipment (I use a Legacy Powermaster), I can run any Conventional loco. Plus, Legacy is really easy to use and set up. I recommend that you read through the manual of course (or watch a few videos on You-Tube). I don't use DCS, but I have done a bit of research in case I ever add it to a future layout (and it continues to be made). I like Command-Control much better than Conventional. You get more features and you don't have to be stuck sitting or standing in front of your transformer(s) to run trains. You can walk around and enjoy your trains from multiple angles.