hi all, once again i'm looking forward to your advice. i have some pocket money and i am thinking to go on with a mac mini. currently, the max configuration is 2GHZ and 2GB RAM. can i modify it to, let's say, 2.4GHZ (or 2.6GHZ) and 4GB RAM ? and if yes, how much more will it cost ??? thanks a lot, in advance.