So I've just finished upgrading all my internal HDs on my Mac Pro 1,1. My startup disk was over four years old, and it just seemed as though things would run smoother, faster bootup, etc, if I got a new drive. So now all the drives are brand new 7200rpm Hitachi's. Transferring between any two of them, activity monitor shows a sustained rate of around 125MB/s. Is that good? Is that "right" for my machine and new hard drives?