It's always good to include an approximate budget, short- or long-term goal, and what you like/dislike about your current setup.
If you're looking to change the sound, the transducers matter the most. That usually means the speakers, but in a vinyl system the phono cartridge is often a cheaper and best bang-for-buck upgrade.
If you're looking to expand access to source material, an inexpensive Wiim or Node streamer and a streaming service subscription can open worlds of new music. Many here swear by it. Counterpoint: my musician friends say it's fine for the famous, but a disaster for the majority.
If you're thinking of embarking on a system-level upgrade, then every scrap of info you give will significantly improve the quality of advice. Whether you are or not, an occasional visit to your closest retailers (or when out of town) will help sharpen your ears and clarify what are the strengths & weaknesses of your current system, as well as finding potential future acquisitions.
