You have to understand what makes a system sound better to you and there in is the issue with most people. Comes back to tubes versus SS, copper/silver. Once you figure out what makes something sound better you don't have to chase sound. For a few bucks and knowledge you can change resistors, capacitors, AC filter chokes, etc. Component design such as point-to-point wired, separate power supply, quality of transformers, etc.
Happy Listening.
Happy Listening.