I´m still getting used to my new mac pro but like it a lot so far. I am under the impression that it is being held back though. It´s not as responsive as I would have hoped. I am working with HDV-Video in Final Cut Studio applications. On the one hand, I will need to buy two internal harddrives for a software RAID 0. I am currently working on the system-drive and it´s clearly not fast enough to handle fluent pro-res work. I´m not so sure about RAM: The activity monitor shows that when I´m working, I have very little "free" RAM (green). Almost none. But I always have around 500 MB "inactive" RAM (blue). Can anyone explain the difference to me? I assume, most people will tell me to buy more RAM, but how much more will be sufficient for my kind of work? Thanks!