The JV1010 has a much more advanced synthesis than any Korg N- or X-series. The N- and X-series have Korg's low-end synthesis (AI2), while the JV1010 basically has the same synthesis as the JV2080 and XP-60/80. The down side of the JV1010 is that you need a computer to edit patches.

The JV1010 contains the "Session" expansion-board. This should be good for pianos, brass etc, and you can expand the JV1010 with one more card if you need to.

Stig