I have a fairly low end reciever, a Yamaha rx496(and a bit old too!) and have some medium quality speakers and sub. I do like the sound but have a feeling that the speakers could sound better. If i were to purchase a much better reciever, and much dearer..would i notice much change in the actual sound? The Yam i have now sounds really nice on Movies, but sound is very flat or more so a bit strong in the mids. SO i dont know if i am better off buying all new speakers, or just a better reciever?.