I will choose Apple Macintosh in accordance to it's OS - Mac OS X 10.4 Tiger, due to it's based on highly reliable and stable foundation - UNIX.
I have been used my new iBook for more then a year and it's really has no breakdowns or failures.
Besides UNIX, the seamlessly built-in desktop search engine - Spotlight makes you finds your information just in seconds. The Mac OS or Macintosh today is truly compatible with other Windows computers, networks, disks or software.
"It's the best operating system out here" saids Walt Mossberg, author of Personal Technology column in Wall Street Journal.