Hi guys I have mac pro 8 core and I have 4 hard drives inside. I compose music on my computer and need to add more drives to my system for samples. I don't wanna go firewire or usb because its not fast enough. And a Esata extender cable for the mac pro is a lot of work to install. My question is how can I add more drives to my system and still get fast speed as with my 4 internal drives? Is their a PCI card I can buy to add more drives? If so any recommendations?