Should I end my search

I will preface my statements by saying I have never really heard significant differences in cables until I changed my powercords. The aforementioned experience has led me to search for cables to complete my current system. Based on a recommendation I started my search with Silver Audio. I received Silver Audio's Jet Stream and Appassionata inter-connect a couple of days ago. In addition, I received Symphony 48 speaker cable. I have the Jet Stream going from CD player to preamp and Appassionata from preamp to amp. Prior to Silver Audio, I had Kimber Hero inter-connect and Clear Day Audio Double Shotgun speaker cable. I began by having my wife listen to some of her favorite music with the lights off. She immediately said, “That I changed something”. It was apparent from the first note something was different. I don’t want to exaggerate, but this is what I heard: Soundstage bigger, detailed, but smoother than before, bass fuller, more defined soundstage, inner detail that was missing before, at one point my wife said “that she could almost see the singer move closer to the mike”, I believe that was the result of the cable’s ability to highlight subtle changes in dynamics. Since this is the first relatively expensive cable that I’ve heard, should I listen to other cables.