The CXA61 features a reimagined power amp stage with optimised capacitors values, and a revised volume pot designed to offer minimised crosstalk.All I can say is see whathifi's articles on the CXA61 and S60, and then if you have the budget and room for them what are you waiting for? Out of the box I could tell this was a keeper, and after 100 hours of run-in the sound is so gorgeous I probably couldn't stack all the glowing adjectives. The CXA61 pairs beautifully with the Polk S60s.