Hello, I ordered a Macbook Pro 2.8 ghz this Sunday. It hasn't been shipped yet so I am wondering if it would make sense to call Apple and try to delay the shipping or even cancel to get Snow Leopard pre-installed? Or should I just go with an upgrade? I have been researching a bit about upgrading Leopard to Snow Leopard versus a "clean" install.. but it is confusing me a bit what is best to do It should be mentioned that this is my first Mac ever - so I'm not so much into how format/reinstall osx and stuff works out on macs. What would you advice me to do considering I just ordered the Mac?