I'm in the process of setting up my new 7.1 receiver (Sony 5000 ES). I'm currently running RF-5's for the front, RC-35 for the center and my question is what should I run for the surround and rear surround. I've been thinking RS-35's and RB-35's respectfully. But I'm not sure if I should just run 4 RS-35's instead. Anyone have thoughts or opinions on that. Thanks.