Unless you are itching to have it as soon as it comes out, get your mac sooner than later, then when Leopard has gone 10.5.1 or 10.5.2, get it, that way you skip most of the .0 bugs. You can install and download the update right away. Even with this much lead time, it takes a little while for all the apps out there to work seamlessly with the new OS. And if you are a student, the Leopard upgrade should be $69 instead of $129 (lucky kids).