I'm planning on getting a new Macbook in the near future. However, one question...WHEN TO BUY?? I have three chances- begining of March, middle of April, or July. I'm not using it for anything really extreme, just e-mail, web, iTunes, and pictures. Do I need to wait for Leopard (with all its glitches) or buy it now (with little to no glitches in the system)?