I have the same proposed setup minus the HSU sub. I went with SVS though I think HSU is also a strong choice. As far as the best match for surrounds I would suggest speakers of the same reference lineup. I personally went with the rs-42 ii's and like the above choices am quite pleased. You could also choose the rs-52/62 ii's as they would also match wonderfully. I would also strongly recommend giving them a listen in person if possible. Opinions seem to vary with Klipsch speakers and there doesn't seem to be much middle ground. They are outstanding for movies and highly efficient meaning they don't need much power to push them to reference levels. Hope this was helpful and good luck.