After a certain point it's not about the equipment, but how you setup the equipment in your room. You have very good equipment that would easily reveal the benefits of good setup.
First experiment with finding the optimal speaker/listening positions. Here you're really looking for the smoothest bass response and most precise imaging/soundstage info. Inches matter.
Second, are all your components positioned on solid, non resonant surfaces? This is particularly important for your turntable.
Third, meticulously align your cartridge/tonearm.
At this point your basics are covered. If you want to go further you could explore room acoustic treatments, cabling and power conditioning. Careful setup is time consuming, but it's cheap. The rest of the stuff can get very expensive.