Im not sure at all on which songs i would take with me but I imagine my boom would either have to be the biggest book of piano\guitar notes i could find which also had a section on how to learn to play the bloody things.
My luxury object would ofcourse then be a guitar or piano that never breaks.
The problem is that noone would be around to take joy in the marvellous pieces of music i would no doubt create on the island.
if only i could have brought some paper, a pen and a lot of bottles