Thank you, all.
I have decided against Bluetooth for the moment, as the one company I was looking at appears to be out of stock until August or so. The company was BlueRail, Tony. I do like the look of their board, but I'm not looking to wait until the fall to get my loco running. Instead, I have found two companies S-Cab and RC Trains. Since the latter is from England, I'm not sure about shipping, but his stuff is simple enough that I would be very interested in using it. S-Cab seems a little more advanced (and more costly) than what I really need at the moment. Within the next three years I'll probably only have a couple trains, so I don't need an expensive transmitter that will run multiple locos.
So, I've got most of my system planned out and basic wiring diagrams drawn. I've even taken most of the Forney apart to see what the wiring currently looks like (though, I cannot get the boiler apart.). I'm still unsure about sound; but if I do add it, it will probably just be a simple chuff (based on speed) and a manual-activated whistle. Additionally, if I do add sound, the speaker will probably have to fit in the steam dome, which only gives me about an 1" of usable space.
That's enough ranting for now, I think. Thoughts, comments, and concerns are more than welcome!!