I'm trying to setup my new mac pro and have a question about RAID. I have two 2TB harddrives and 1 640GB harddrive and about 1.5 GB data that I want to store internally. Currently I am using the one 2TB for the data with the other for backup with the 640GB unused. I've noticed access to some of the data is a bit slow, particularly music files in Itunes. If I set up the 640Gb and the 2Tb in Raid0 would that give me any speed improvement?