Only you can say what you prefer from your system. BUT once you learn what makes a component sound the way it does, then you can figure out how to improve your system. Understand different designs SS vs. tubes, how tube sizes make a difference (small, large), tube rectification, tube regulation, choke loaded, transformer coupled, direct heated triode, class A, Class D, etc. You have to experiment to see what you like.
You also can have an existing component modified that can be the best way to go. The majority of manufacturers do not use high quality parts so upgrading them can possibly have a bigger impact on sound for much less than swapping out a component. Better power supply capacitors (think Nichicon), AC filter chokes, output resistors (Shinkoh, Caddock, Amtrans, Vishay), upgrade the volume control, just for starters.
Happy Listening.