I got a lot of money over christmas and now im thinking of buying a Digitrax Zephyr basic set, but I have a few questions. Is this set all I need to get started? What is this thing that comes with it? (http://www.digitrax.com/prd_lt1.php) Why is this so much better than the bachmann dcc set? Everyone says you can "program" the trains, what exactly can you/do you program the trains to do? I am interested in this basic set up, and curious, why are te other digitrax sets so expensive? Is there another post or some website that goes in detail about the Zephyr set? Any comments is greatly appreciated.