After reading that list of options, I wonder who would use all of them. I also model in HOn3 and have a layout running Blackstone engines and NCE DCC and I have yet to date use maybe 10 features at the most and that's on a good day. I have two LGB Moguls ready for RailPro systems, but not to excided about the steam sounds offered at this time, so I will either wait for RailPro to come out with NG steam sounds, or go with AirWire for them. My G gauge diesels have RailPro and I'm very please with the diesel options that RailPro offers, in fact being battery powered it's much better then I ever dreamed it would be. All I've ever done with RailPro steam is listen to the sounds on their website, so I have no first hand info on it, but if it works anywhere like the diesel sounds, it should do what you want. Looks like Tim did a very good job of answering your questions, thanks Tim, good info.
trainman