My draw is the DCC & sound, honestly. The full throttle features of LokSound add a totally different dimension of realism to running trains. I'm a relatively new upstart in the hobby, so I don't have the dilemma of having to upgrade too many locomotives for sound, but considering how much I enjoy it, I would do a limited upgrade of the locomotives I like if I had to. Anyway, I got an update from IM on the availability and I will post it for anyone who may be interested.