Have fun with your trains
"TRAIN up a child in the way he should go, and when he is old he will not depart from it" ... Proverbs 22:6
I model in On30 and Large Scale. I have the Bachmann Mogul, Climax, Consolidation, and two of the Porters. I'm very impressed with the quality and the detail of these locos although I've had trouble with the drive shaft of the Climax. The recent releases such as the Consolidation come equipped with DCC and can also be operated with regular DC. I've yet to install DCC on the other locos I have but plan to in the future. On30 is a lot easier to work with than the smaller scales and most locos will negotiate 18'' or smaller radii. The detailing potentials are great for this scale and it costs about the same as HO.
Within the past year I've been modeling in Large Scale and got hooked on it due to the ease of working with the larger size and the fantastic detailing possible but also model in On30 due to all the high quality products available. I believe On30 is one of the best things that ever happened in narrow gauge due to the fact that it runs on HO track gauge and is very affordable compared to narrow gauge modeling in other scales.
Im sorry I can't help you out with any information concerning the installation of DCC as I've never installed DCC modules on locos. Although I prefer to build and do things myself, I'd probably spend the money and have it done by Tony's Train Exchange.
As other posters suggested, visit the following site for comprehensive information and modeling tips about On30:
The magazines Narrow Gauge and Shortline Gazette and Light Iron Digest are other excellent sources for On30 and narrow gauge modeling.