It would really help if you'd show, or at least state clearly, exactly what devices you have and how they're connected. Like this:
Laptop --> USB DAC --> Power Amp --> 2-Way Passive Speakers
Or whatever specific devices you have. I can tell you that usually the least number of components is best. And if you're unhappy with the sound quality you have now, explain what aspect you're dissatisfied with.
Often it's futile chasing "equipment" upgrades, especially if the room you listen in has no acoustic treatment. Even just having a pair of absorber panels at the side-wall reflection points will do much more to improve clarity than any "gear" upgrade.