using 2 computers as my main, can i transfer music between them with a firewire? thanks! also, if i cant do this easily almost every time i get a new song, what computer should i use as my "main" computer? 2.0 GHz Aluminum iMac 2 GB RAM 250 GB HD 2.16 GHz Macbook Pro 1 GB RAM 120 GB HD i know you think the iMac is the obvious, but i do go on trips often, and it would be nice to have my music collection with me. One last question, I have an iphone. How could i transfer the computer i use it? just plug it in like with an ipod or do i have to do something?