All good answers, the room is very important and can be 50% of the sound or more sometimes. The Speaker and amp marriage is critical. I recently upgraded to different speakers and when I got them home, they sounded like crap, not musical at all. I tried a bunch of preamps to get the sonics to improve but in the end chaning the amp gave me the synergy that I needed. The a good source is critical to get you to the next level. One you have the sonics you are looking for then you need to see what peramp will work with your system, every component sounds different as do cables, rooms, etc. so that you time to find what you are looking for and experiment.
Happy Listening.
Happy Listening.