I was configuring a mac pro and was wondering which options are best purchased from places other than Apple? I've heard that the airport card and bluetooth have to be installed by a professional so I would probably opt to purchase those with the computer. Would it make sense to get another superdrive from another vendor? Where is the best place to get a hard drive right now for the MacPro? I would also be interested in the wireless keyboard and mouse. I've seen Applecare on ebay and most people recommend getting memory from Crucial or OWC.