You have a good HD projector with HDMI, PS3 with HDMI which can take care of your blu-ray and dvd. Because the projector lacks any sound out connections and the PS3 only does HDMI out, you should look at replacing the receiver and at least the fronts or front & center speakers. Personally, I like Klipsch and would keep the powered sub. Because of the range of music and types of movies we watch, we have all Klipsche speakers -- I don't like the muddy sounds of some of the others, that's a personal preference and everyone is different when it comes to that.