I'm buying the Digitrax Zephyr DCC starter set for a small N scale layout I'm building (28" x 80"). My simple questions are. 1.) Do I need Digitrax decoders or can I use MRC or other brands of decoder? 2.) How simple is the wiring? Is it as simple as a couple of feeder wires or more complicated? I hate wiring for running multiple locos on DC so how much simpler is DCC?