Yes you can import the va7 users, but they will need tweaking, and can only be imported via Floppy Disk ..
The rom styles are similar to the VA-series with a few new additions...
Video out picture is OK, I think that vga out would have been more suitable...
Dynamic split would come in handy when you play chords along with a solo line; You can specify wheather it should play high or low notes, so when you are playing a melody with a single note only upper1 sounds, and when you hold that single note and play below or above it, the rest of the uppers will be heard...
You can use up to 3 MFX's for style parts and song parts combined...
This one does not have the MP3 option installed, so I wouldn't be able to tell you about that...