Hello everyone, last week after many years I changed the speakers, after a lot of research, availability in Argentina and obviously prices, I bought Wharfedale 12.2 and I am very happy listening to them, I have a Polk Audio HTS10 subwoofer and I continue to adjust it as the days goes by, a Loxjie D30 DAC and a NAD 325 amplifier, I already ordered 12 gauge cables (do they need to be oxygen-free??). The seller tells me that the best upgrade would be to change the speakers (he seems like a good guy) but I've had them for 1 week!! I want to listen to them for a couple of years, so a possibility would be to give my beloved, beloved, NAD325 and approximately 800 USD to upgrade to a Marantz PM8005 made in Japan, is it worth the change? Or should I save more and buy another more powerful or higher end one? Thank you very much and greetings!