Keep in mind overseas that oyu will need a power transformer for whatever you do do.
I would make the general suggestion for music laptops especially that cool and quiet are MUCH more important than overall power on a notebook. If you want overall power get a mini desktop instead for much less money and much more power, while still being cool and quiet.
At any rate the Macbook is definitly doable for audio production, and since the last firmware updates Apple's ICBM(Intel Chip Based Macbooks) laptops seem to be running quieter and cooler is what I have heard maing them an even better choice possibly. Unfortunatly none of them are truly Professional laptops until you get the port range on the 17" Macbook Pro, but most of them should work well other than that, and an expresscard eSata card isnt out of the question I suppose, though I am not sure the regular macbooks have an expresscard slot.