I found some extra information on this beasty..

Its from the same company that produces the XMS boards for the PA1X.. http://www.xprodata.de/
All sounds of the XMS 1, 2 and 4 are inside the Xanadu organ.

Next to that there is an extra organ module inside the organ. (which is probably based on vst's... i would not be surprised if there was a kind of receptor inside) You can also choose to add a complete XG set of sounds and even mega voices to this organ...

The organ consists out of 2 or 3 mannuals and the top manuall (a korg Pa2X) can be removed from the home organ to take it to a gigg.

And yes it will be a very expensive and custom made instrument, your wish is their command..

So here you have the perfect opposition against Lowrey, Böhm and Wersi...