Hello, I have a few questions and hope that those of you who are much smarter than me on the audio subject can help me out. I currently have an Onkyo TX-SR601 receiver. I am just using Onkyo bookshelfs as fronts and I have a Polk CSI30 as a center channel and Tru Audio CP-8 in ceiling rears and an Infinity 12" subwoofer. Basically I am wanting to do an all around upgrade to Polk speakers except maybe the rears because of my room setup restrictions. I am looking to get the RTI A7's as fronts but mainly am wondering if my receiver can handle them or if I need a receiver upgrade as well. My center channel has been fine so far so I don't know if I should keep that or upgrade to a center that matches the RTI A series. My sub has been great but I don't know if a Polk sub would better suit the setup. I was considering the Onkyo TX-SR805 but still don't know if that's enough for the A7's or if I would need external amps or anything like that. I was also considering the RTI A9's but don't know about pairing them with the 805. Everything I have read pretty much says the A9's will need extra amps and I don't know where to start. I have read a lot of posts and threads in this forum but can't find exactly what I'm looking for! Any input/help would be much appreciated. Thank you so much! I guess I should also add that my usage is about 85% home theater/movies and 15% music. Thanks!