Hello everyone, I am planning to buy a new iMac but I am a little worried about the hard drive noise and I would like to have some feedback on several points. 1. First of all, I will get the high end 21.5", because 27" is too big and too expensive for me. I am thinking of getting the standard one (not BTO) in order to be able to replace it quite easily at my local Apple store, as it seems that the yellow tinge and the high pitched noise are two issues that can appear to any iMac configurations. 2. Now I have read that the HD noise is due to the 1TB - seagate HD which is found in the standard configuration. Is this problem recurrent or can I get rid of it if I ask for a replacement? Do I have a chance to get a WD hard drive or will I always get the seagate no matter what? 3. I would love to replace the hard drive myself, but as I don't really trust my hands, I'd rather not. The question is, could my local Apple store swap the hard drives for me if I come with my own one? Can I use any brands of HD or do I have any constraints? Thanks in advance for all your advises and information, have a nice day! Fred.