It's interesting, but always remember that your 2 main units for English are almost always going to be English Advanced so you should be prepared for what is more than 1 unit of work in Extension.
And what you're looking at is for the HSC, for preliminary, your school chooses what module/s you do.
And even for the HSC, out of the prescribed ones, your school chooses only 1 module, so you're stuck with that for the rest of the year.
My school does After the Bomb in year 12, but some schools do Romanticism which I've heard to be very very dry in content.