I want to replace my old Cambridge A500 (Â£150 new) with a second hand bargain on eBay. What should I go for? Jap crap, Nad, Arcam? It doesn't need a phono stage or bi-wiring facility but I would like a headphone socket which is missing with the A500. I want something at 80wpc or higher for no more than Â£100. Or maybe I could add a power amp to my A500 to beef it up?