Strong support for Richard's opinion. If you are modelling at the quality level Portescap motors imply, DCC is a shoe in. The continuous track power alone giving much improved pick-up reliability is a huge asset. Programmable acceleration and braking on the high frequency drive decoders now available makes for very realistic representation of the high inertia of railway vehicles. Fine control when shunting is easily achieved: my ordinary Hornby J94 as sold with its small cheapo motor and relatively low gear ratio, will pick up a trot of wagons one by one at a smooth slow walking pace.