I have a small 3' x 5' N gauge layout. It consists of 2 ovals and each is on a different level, they connect to each other and they have their own transformer/power supply. I am blown out of the water with DCC sound and some DCC controls (like running multiple engines on the same track and not crashing into each other). I have a few basic questions if someone would answer them for me: 1. Are different manufacturer's DCC and Sound compatible with each other? Or do they each need their own controllers/power supply? 2. Is there a system that is most compatible? What's its name? Or am I dreaming? 3. Is there a quick guide to learn most of this (just enough to get operational)? 4. And of course cost is very important but results will be very important. Any help received will be much appreciated by a old (80's) Model Train guy. Thanks!!!!!