You're whole system has to contribute to this. Its not something that can happen by just getting a new pair of speakers.
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Most Studio monitors have what you are looking for . Passive or active . Seek them out and give a listen. If you go passive it is harder to find the right amp to go with them . I would personally go with the actives . They are already set up for optimal sound. You will be amazed at the low level detail . Even at the beginning starting price of a few hundred dollars .
Looking up your amp I see it outputs 300W @ 8ohms so I imagine what I'm presently breaking in would do: Clearwave Duet 6 monitors. They're rated at 85db efficiency and you will have the power to move them. They pack a hell of a lotta punch for their size.
They can put out at low volumes but the span to high volumes can be seem a short distance as they come alive rather quickly. The dynamics can be off putting at first as they're fairly flat for most of the spectrum so when the mids and bass assert themselves, it can surprise and/or shock you (which can be pleasurable).
Some recordings with more headroom than normal will amply demonstrate this.
All the best,