I have long been interested in purchasing an Apple Powerbook to do my FCP editing on it. But when I went to the Apple site I noticed that the disk speed was in the neighborhood of 4200 rpms. Is this fast enough to use FCP: digitizing, editing, rendering, and exporting the files? I fear that such a slow RPM on the hard drive would create a sort of "bottleneck" when using FCP. I don't know. It sounds awfully slow to me even though most PBs seem to have pretty fast processor speeds. If anyone has an answer to these questions, I would greatly appreciate it. Thanks!