X-Plane 10 will not be out until the end of 2011.
X-P 9 will have to suffice.......
From Austin Meyer the X-P maker/owner/designer. A recent post on x-plane.org
"X-Plane 10 is much, much, much slower in coming along than I planned.. but it is much, much better as well. It is slow because I have raised the bar ridiculously high for this release, simply because I CAN. SO, I am keeping v9 totally bug-free while v10 is developed, which I am hoping to have ready by the end of this year.[2011]"
So glad I have learnt to be patient.......