Lufia II means better soundtrack
If you like music from Lufia I, you will definitely love it from the second game.
You can say: Great game + quality soundtrack = Lufia II :).
Like in Lufia I this music can cheer you up too. Some of the tunes are short, but they are longer than in the first game, so it doesn't really matter. They create happy or sad atmosphere, or even "battle" atmosphere, when you are listening to them.
So, you need my recommendation? Try Battle themes or something like Last Duel or For the Saviour. You will like it :).
To listen, or not to listen, - that is the question!
To listen, of course! If you didn't play the game you are missing much. But if you are bored download the soundtrack :).