Hello, I’m new here and am trying to get together a decent home entertainment system. I bought a RCA 5:1 system a few years ago and am not impressed by the sound. I was hoping I could build off the receiver and just replace the speakers. I have seen the Bose redline speakers on eBay for cheap. I was wondering if I could just replace the speakers with the Bose redline cubes. If this would help the sound? Any help is appreciated.