I just ordered a cambridge 640c v.1 over the weekend to replace the jvc dvd player I was using a source for my paradigm studio20s, but I eventually want to replace them with a better monitor style speaker, most likely the tyler taylo reference monitor. I am wondering if I want to get the biggest improvement in sound in my system, should I focus on the speakers, or my amp, right now I have a yamaha 70 surround reciever? Wondering which change would make the bigger difference, if if matters I am considering jolida hybrid integrateds for when I am able to upgrade the amp. Not sure when this could happen, but am curious. Thanks for all ideas.