Hi, I am planning on getting a new imac when leopard is released. Hopefully on 10/26/07. More than likely I will need to install leopard over tiger. Since I am a new mac user do you recommend waiting till I can get one pre-loaded with leopard? Will it cause me trouble by upgradeing down the road? I don't won't to destroy my new imac. Also will the original disk that came in the box with the computer be useless or will the leopard disk have all the drivers on it? Thanks for your help