I use XY III+ on a Windows XP desk top, and want to buy a laptop as a backup computer.I can shop for a second hand laptop running XP. But should I rule out the idea of running Xy on a Mac? Or on a Windows 7 laptop?I don't remember any happy stories about Win7 and Xy -- none so far, at least -- but I believe several people on the list use Xy on Macs.Do they have any advice?Lynn Brenner