If you have lots of musics and wanna organize them well,you should get a Mac,thats what Mac are for to me. But if you like messaging or gaming,you should get a windows,better with core 2 duo ofcourse and if is vista,make sure your RAM is big enough! But make sure you have a good anti-virus software too. Im a chatter and kind of a gamer,so i will go for windows (i need to get a better anti-virus =.=).