I too own the Perspectives and had them upgraded. Don't do it. Needless to say I had expected a significant improvement in SQ.Not even close. It wouldn't have been worth it at half the price, notto mention shipping costs. I am big on cables, all of them, not the least of, power cables. Ignore the power cable naysayers.Over the years I have upgraded all cables and at varying price points.I have never not been happy with the results.There are too many to mention and I haven’t heard as many as a lot of other memembers. I now have a full loom of the highest end Townshend cables. These are my forever cables. So many great products out there.Cerious Technologies was a favorite. Audition, return policies abound. Silversmith. Cables, cables, cables. I also recommend 'tweaks' from VeraFi audio. Great results at relatively inexpensive prices.