The IBM Travelstar 20GB HD in my TiBook is awfully noisy, and even my Clamshell iBook puts it to shame noise-wise (I'm aware they have the same type of HD, but the surrounding of the HD is much better) If I were to get a new 5400 or 7200 RPM HD for it, would the noise level be reduced? I know its the HD making all the noise, and I'd like to have a quieter mobile experience. During English class, the only thing you can hear when the class calms down is the whine of the damn hard drive, and it drives me nuts. My old thinkpad was much quieter, and the iBook too. I realize as well that the thickness of the computer plays into the noise too. I just want the thing to shut up once in a while. All input appreciated, Thanks.