Thanks for the help Gentlemen, I will be researching all of these to see what will be the best option for my customer. Hope everyone has a great weekend, Rick

I guess what I am asking is what dcc cards will be sufficient for each of 2 engines on the same track pulling 4 cars and 5 cars, none pulling current from the track, on a flat 0 grade track only needing sound, no lights, as well as what controller is recommended. I haven't gotten the trains in my hand yet, only going by what the owner has told me on the phone, but sounds like a simple setup. What does Bachmann install on G-Scale trains and what DCC controller do they usually recommend or supply? 

I have a customer who wants to add dcc sound to 2 steam locomotives, one is a g scale Denver and Rio Grande 4-6-0, cab number 43 and the other is also a 4-6-0 Penn steamer, cab number 863. It looks like either the tsunami 826104 or 826116 sound dcc controllers would work, anyone have any input on this, I very much appreciate any help out there.