1) Does having more mp3s/video files slow system? Just wanted to add that , i have around 5gb of mp3 transfered to my brand new mac along with some software i installed etc like aperture office etc. I did notice a slight delay in boot time opening programs when restarting the system etc as opposed to when i got my imac brand new. Does it all depend on the ram?(i have 1gb) for things to run faster.(should i get more ram in any case) Or does it depend on all the files that are cramed into into the harddrive. What if my mp3 are stored on an external hardddrive would that make a difference in speed of the mac booting up? I have an ONYX program that does some harddrive permission etc etc and it seems to help a bit in speeding up i guess. I know most mac programs are memory hungry and one can see it in the dashboard widgets. 2) I hear this squeaking noise when everything is quite and im just browising.Nothing alarming but just worried that it might end up being a faulty drive or fan later.Anyone heard it? 3) Say when i go to the adress bar and i want to go to the begining of the address, in windows i used to hit home key and the cursor would take me there,or in a paragraph i hit the home key and go the begining of the sentence. any similar key on mac? 4) Whats the power usage of an imac c2d 20" if left on or rather in sleep mode for most of the day compared to a pc?(i know its very less but numbers would be good!) THANKS!