Ok, so I'm using a dash of hyperbole in the title of this post, but Simson Garfinkel (writing for Computerworld) does recommend Apple portables based on security functionality alone. He highlights Filevault, secure virtual memory, and secure empty trash as the features of OS X that make Apple portables so secure. Sure, as he points out, one can get Windows up to this level of security (Lenovo does include similar utilities with their ThinkPads) but not without tinkering with Windows. OS X has it all built right in.
The one thing that Simson would like to see Apple do? Enable all of these features by default.
How many folks out there are using a combo of these features on their Macs?