Not only should you switch from 9 to OS X because the difference is insanely better, but I found that the more I discover in Tiger, the better it is than Panther. Much more automation capabilities, and Spotlight has changed the way I file stuff, as in, I no longer need a hundred different folders. It can search every file on you computer via keyword, including content in text docs and emails, and even find applications faster than navigating through the windows. Eventually every OS will use this type of features (ie MS Vista) but for now you can get it through Tiger.