I've owned an X-10 for three years now. Nothing bad to say about the boat, we've really enjoyed it. I traded it in this year for an X-2, something different. The wake on the X-2 is probably better for boarding but you give up a lot of room as well.
Here's a vid of a buddy behind my X-10. Factory ballast and 3 people inside.
THe picture isn't great but it will give you an idea of the wake. http://members.shaw.ca/radstickers/BrennanWakeboarding.wmv