Voted on #3. (I would like to see something else.)
The reason I voted this is:
It's great to have remixes/remakes of the original music, but what about what sparky said? (If we have multiple musics)
Wouldn't it be too repetitive to have only remakes/remixes of the original?
I do understand that we don't wanna get too far since the music is already great for the main menu. But we could include both remixes/remakes and some good made custom musics. (Either cc-by or literally composed by himself.)
In my case, it would yet be easier to compose a new music than rewrite a good orchestral version of the original ^^.
Anyway, I would personally prefer having both original and custom musics being included. (Maybe do a little contest that would either reward something or reward the player being first of, added to the credits but would also make him get much more known if he wants to start in music. ^^ (If we do get trem on steam once we got nothing copyrighted in it, it would be possible.)
Now I'ma go back to my composition ^^