I know 7200 RPM or above is always recommended for recording/audio, but does a 5400 RPM HD really suck? I would probably be recording onto an external firewire drive at 7200 RPM - I assume this would be faster than recording onto the internal 5400 RPM drive? Is my DAW going to run slow and shitty on a 5400 RPM drive? If I have to replace the internal drive with a 7200 RPM one anyway, the stock HD size is unimportant anyway.