Thanks all, you've definitely given me food for thought. Not sure I like buying into 7 if its not going to be supported for very long, and yet I remember the terror of buying Vista in its infancy. After that experience I went "back" to XP Pro for the next two machines in the household.
Well, don't worry, no matter where you end up, it will not
be as bad as Vista.*
*Assuming you don't go back to Millenium Edition