Sorry that this is a little off topic. I was thinking why not use hard disks to store and playback DVD/CDs. I find the idea of paying 5K or more for a DVD/CD player ridiculous. Thus why not harddisk? Harddisk is less susceptible to vibrations unlike CDs. They don't have the problem of warping etc. Thus wouldn't a hardisk produce the best sound and lowest cost (flash memory would be the best but cost a lot more per MB)?