Carada is a well respected screen manufacturer which doesn't cost a fortune. Also, I would definitely get more than one subwoofer. The PB13 is not bad, but a single one won't do for a really impressive home theater. As for 3D blu ray players, Oppo, Samsung, Sony, any will do.
Since you are getting Atmos, you will not want to use the RP-250S as surrounds. You will want a typical bookshelf speaker. If you are stuck on Klipsch, I would get the RP-160M for side surrounds and back surrounds. You will also want to use in-ceiling speakers for the height channels.