I'm with you darth maul 
it REALLY sucks that they come in these tightly sealed boxes (this last one was really made that clear
) that you can't modify and buy from anyone else.....I sometimes take a look inside my cabinet just for kicks because I feel it's MY computer and I love to tingle around with it. Feels great to upgrade. macs are just a damn box that you gotta wipe some dust off once in a while and whine about the one-buttoned mouse.
it REALLY sucks that they come in these tightly sealed boxes (this last one was really made that clear