The DCC one I have of the Kato was done by someone else, have a few others but buying already done sound is a plus for me.
The Kato NW2's were very nice engines. To my knowledge, their version of the Santa Fe NW2 in the original black/silver scheme without zebra stripes was the only loco ever produced in this paint scheme. The problem of the Kato NW2's was that even installation of a non-sound decoder required removing parts of the weights or putting the decoder in the cab where it would be visible.
https://youtu.be/rY0WxgSXdEE
Did a pre-order for two NW2's from Walthers in SP in HO with DCC and sound for $145 each. Never did a pre-order before. I have a few NW2's from Kato but only one is DCC and none have sound.