I saw the ES unit today at CEDIA. It is by far the most impressive looking DVD/CD changer I have ever seen. The build quality on the unit stands out from any other changer. I did not particularly care for the silver color, but that's what the new Sony line is.
The Sony changer will be able to be connected and controlled by the new Escient unit (MSRP $1,999) which is essentially a Kenwood Sovereign Entre without MP3 recording or playback capability--but it will give you the control that provides about the best GUI I've seen. The new Escient can control up to three 400 disc changers--either Kenwood or Sony--via connection to the 232 port on each changer.
The lurking question is whether the Escient unit, although able to control either the Kenwood or the Sony, can control one of each from the same unit. This would give you DVD-Audio (from the Kenwood) and Multichannel SACD (from the Sony), all controlled by the Escient unit. If you want to upgrade and add the music server, that will be more.
If you have an attraction to changers, then you will be attracted to this piece.
Nick Satullo