I want to upgrade an internal SATA drive (bigger storage) for my MacPro 3.1 Quad core Xeon/2.8 GHz. Since this is from '08, what is the drive storage limit I can use? I am a composer and plan on using this for my orchestral sample libraries. Which 7200 SATA drive do you recommend since I need a fast as drive as possible. Don't want to get into SSDs yet because of the size of drive I need. Thanks.