"Love & Peace" hi...
On Frebruary 10 here in Greece in Roland's distributor i tested myself a prerelease version of XV88 (but no any expansions) and i listened its sound. I sounds great and believe me, not at all the same as XP/JVs. Roland's salesmen told me that some sortcomings will be corrected when XV will be on the market (April in Greece). I must say to you that though recently i bought a Korg Triton, i ordered an XV-88.
You can read some posts on Sonic State from people who heard piano board at NAMM. (http://www.the-gas-station.com)