MacOS X Tiger - Intel/PPC Single User Version - £89.00
MacOS X Tiger - Intel/PPC 5 User Family Pack - £129.00
Windows XP Home Edition Single User - £218.95
Windows XP Pro Edition Single User - £259.95
So, pay less than a ton to get the up to date MacOS, or for more than twice the cost, get the 5 year old Windows version.
What would you take?
Oh, one last thing.
" IBM also jumped on the Linux bandwagon over its own AIX version of Unix."
AIX was developed BEFORE Linux. It was a variant of System V Unix that ran on the IBM servers.
VERY stable OS!!!
Mac OS X, unlike Windows doesn't have a "home" version. It has a server version, but there is Windows Server. This is the main reason why people tend to compare OS X to XP Pro (because both aren't crippled like XP Home is). Vista is coming soon, though, and it will offer itself in five versions (stupid stupid stupid) instead of just one full featured version.
AIX was also in the old Apple Network Servers. Mactracker rules!!!