I bought a CP Rail C630m with Tsunami sound and then fitted a BC Rail pair with Loksound select. The ESU Loksound wins hands down on both sound and motor control. I will post avideo of the two sometime I have a minute.
Yes the sound Version and it runs sweet! This was Genesis last chance with me as I have had some dogs, especially the F45 which had really dodgy pick up but eventually got it cured.
The price is away out of my league too but a certain retailer in Toronto was selling these at one third retail price when I was visiting in 2011 and then the same retailer vanished with thousands of dollars of deposits!! I was one of the lucky ones.