Which Decoder Should I Pick?

[Charlie B]

Reading all of this can be a good thing, but it can also make it seem so complicated. When I built my layout I soldiered every joint, thus I have at least a 12 gauge buss running under every train. I also used 12 gauge wire running under the layout and I plan on adding a few more feeders. You can never have too many feeders, but at some point it gets ridiculous. I really figure with soldiered joints a drop to the 12 gauge wire bus every 20 feet is enough and it has been fine for 12 years now. for the first 3 years I just had the 2 wires to the track on each of the 4 blocks. You will learn more and understand it better if you start running the trains and then fix the problems  Keep your wiring in phase which means the same wire goes to the same track on the entire layout. with DC in order to run trains in opposite directions on a two track main the tracks have to be isolated and the wiring reverse on one track. If you have a cross over it requires some complicated wiring. with dcc you keep the same wires and only need insulated joints at the crossover switch, the direction switch is in the decoder. LED lighting will work on cars because the LEDS will be using the AC current (actually flashing 60 times a second). 
Cheers
Charlie