Okay, folks... Here goes.. XG Voices are an extension to the GM Midi specification. You can do things with XG voices that you can't do with regular panel Voices. You can get different types of effects, etc., with an XG Voice that you can't get with a Panel Voice, correct?
Why I am wondering about all of this is because my next Arranger, or non Arranger Keyboard if it happens to be a Yamaha, will all have XG capability (if it supports Midi). Does Yamaha ever improve on its XG Voices? We all have these really nice Panel voices on our PSR 2000/2100 9000Pro and Tyroses, etc., but sometimes the XG Voices just don't cut it, at least on my PSR 2000 anyway.

When Yamaha increased the Wav ROM on the PSR 2100 to twice that of the PSR 2000 does that mean that some of the increase goes to the XG Voices as well? If so, are the XG Voices of 'better' quality (sound) than its predecessor? Or does it just mean that Yamaha "compressed" the PSR 2100's Wav ROM to a 2:1 ratio and that the PSR 2000's Wav ROM is 'uncompressed'?

thereby negating any sound improvement on the PSR 2100? PS: [It has been noted that you can't tell any difference or improvement in sound quality over the PSR 2000] except for possibly the 'additional' Sweet!, Live!, and Cool! voices on the PSR 2100, but these are additional voices and not the ones already on both boards.
For instance, will the Motif ES's XG Voices be "any" better than the ones on my PSR 2000? If so, in what way? Does Yamaha ever use any "Real" Sampled instruments when making up the XG Wav Samples? From what I understand my PSR 2000's XG Voices are not Sampled from "real" instruments whether it be Strings, guitars, horns, etc. Yet the Panel Voices I think are "all" sampled from real live instruments, ie., real Violin, real Guitar, real Sax, etc.
Also on a side note: Do any of you Tyros' owners notice any improvement in the GM2 Midi Standard over GM? I would think Yamaha would have included a midi demo or two on the Tyros that was sequenced using GM2 to show off GM2 capability.--( You just don't hear much about GM2) by way of how good it is over GM. The internet Buzz over GM2 just doesn't seem to be there.
I guess my point is: is XG as; as XG is; or ever will be? In other words, is there no variation in quality from one Board to another and that it's just a standard that can't and won't be improved upon whether from one Board to another or even in the XG Specification itself? Or is there a Yamaha Board that has a 'Killer' XG sound set? Will the next High End Arranger from Yamaha {with internal speakers I hope}

, have a better XG Voice set than my current Keyboard has? Or will the Motif ES?
BTW, when playing Midi files on my PSR 2000, I get absolutely fantastic sound from my XG Voices but sometimes I switch over to an even better Panel Voice when called for. But when I " personally play" the Keyboard using an XG Voice, sometimes I get less than desirable results. An example of this would be the XG Brass or XG Woodwinds.
Does anybody have any insight into this or these matter[s]?
Best regards,
Mike