I guess the best result you can get with a "good" game (i.e. gfx, playable) but with music/sfx you don`t like. There should be a lot of such games. Here are some random examples where I think they could profit from rewriting music/effects:
RickDangerous1&2, Nitro, Drakkhen, GoldenAxe, FirePower
Of course there are better games available.