I need to get more disk space in my Mac Pro for my ever-growing Pro Tools sample library. Obviously since I'll be accessing and streaming large samples, performance is a priority. I'm leaning towards the Caviar Black 1tb. Is there any difference at all in performance when it comes to the size of a drive? Is the 1.5 or 2tb faster or have any advantages/disadvantages besides storage capacity? Any other drives I should be looking at?? Is there really THAT big of a difference between the Black and Blue drives or the purpose I'll be using it for? Thanks.