Stuart.
Your reply has helped a lot.
...fairly light for a beginner ski.
What do you mean by this?
I have heard some people say that it is less stable than the XT ... It feels faster than the XT but that may be subjective...
I've heard both these as well, but haven't managed to paddle an XT yet.
I posted comments about my paddle with a demo Mentor ski a week or so ago and enjoyed paddling the ski - I was more comfortable after swapping back from a deep-seat Icon. I've since paddled the Robberg Express, but found this too tight on my hips as well as being quite tippy.
The Mentor does seem to have a higher seat that the other skis (Icon and Robberg Express) and I wondered if this could cause issues in rougher water.