Hey all! For editing 1080p AVCHD video with an external drive through FireWire800, is it best to just get a 7200rpm HDD rather than an SSD drive? I ask because of the limitations of speed the Firewire port will have, despite SSD being speedier. Is the difference substantial? If it helps to know, there maybe be 1 to 3 streams of 1080p video at once. Thanks!