Great that you have components. This allows for changes/upgrades as you go. So, how does one go from mid-fi, to hi-fi? Been there and it has been a journey of 42 years. I am always looking, particularly in the used sector. I started with speakers I built and a Marantz integrated solid state, that became a Van Alstine amp, with a Bravura preamp. Don't be happy knowing that what you have can be better. I did a quick look on craigslist and you will find that some areas are hotter for some brands than others. Example below, Klipsch is from Arkansas, deep roots. That said, I love the Klipsch speaker sound better with tube than solid state. The way that I arrived at my "ultimate system", is find something that you absolutely love. It could be an amp, speakers etc... From there you have to match reality to sound. Always trust your ears and screw everyone else. Lots love Polk speakers and I can't stand them. Love Klipsch on tubes. Love a good LS35A with a high current amp. There is magic to be found but you have to find first the "thing" and build around it. Welcome to the arena, there will be blood. Trust your ears, not me or anyone else. Just know that it can always be better.