I was thinking about getting a new mac pro and buying a WD raptor 10k 150gb drive to have the OS installed on. Do I just use their OSX software and install it on that drive, then wipe the other so I could use it for storing music etc? Sorry, havent had much experience with multiple HD's but I'm starting to store more and more data and will probably want 2. I had a 10k rpm HD in my Dell and loved the added speed with everything and wanted to have the same power in my Mac. Might even get a 3rd Raptor HD for Bootcamp to save some of my PC programs when I decided to toss it ou. Any suggestions?