Hello.
Lol I wish I knew which of those sounds were from the XV....

I can say that I played a Roland EM55 which has the same number of sounds (3500+) but only 20 mb PCM and it sounded great to my ear..

Considering that the Roland VA5 and VA7 have 48 mb for its 3500 + sounds ...the quality is more than double that of the EM 55..