The sentence should also be accepted without the היא.
'music' can be written either as מוזיקה or מוסיקה, both versions are acceptable.
This applies also to physics: פיזיקה/פיסיקה , physical: פיסית/פיזית.
A more colloquial / evocative expression in this context would be "like fine wine."
How do you know when to use the extra pronoun?