In which version of Heroes is the music (battle, town, overworld, victory, defeat) the best?

I prefer the battle themes from the 4th and 5th installments (especially the castle siege theme), as well as one of the themes from the 3rd installment (combat02). But the in-game themes are most interesting in the 2nd and 3rd installments. I haven't played the 2nd game, but I did find the music separately.