I took advantage the upgrade program and replaced my 6300 with the 6500. I was very impressed with my 6300, so I did not expect much difference with the 6500 other than more slices and the filters. Boy was I wrong! The receiver is amazing at what it hears. I am in a rural environment and all of the utilities from the power lines to cable TV are buried. The only extraneous sounds I hear are the electric fence charger when they’re using a nearby pasture or an occasional car or truck going by on the road out-front. I should also add the road is a dead-end, so there is very little traffic. I have a full-sized 160-meter horizontal loop. Once in a great while the WNB filter is useful there, but most of the time that filter is not on. When I first bought my 6300, I could not afford a 6500 and that was really what I wanted. The trade-in program worked great for me, and I am very pleased with my 6500. My suggestion is – upgrade if you have a 6300!