I currently have the HTD level III towers, center, mains(as side surrounds), and a svs 20-39pc sub. I think I have been convinced to get dipoles for the rear surrounds, but since HTD doesn't make any, I don't know what to get. How important is it to match the rest of the speakers? I would like to spend no more than $200 or so, if possible. Any suggestions would be greatly appreciated!