Speakers are more difficult to recommend. Measurements help: reasonably flat FR response and (this may not be the right terminology, I'm still learning) even directivity that will respond to EQ. You should check that the speakers can provide the SPL you want with low enough distortion. All available from measurements.
After that, there is a big personal preference choice. Obviously, you also need to fit them into a space. Ideally you will hear them in your own room first - not always easy to do.
Plenty of recommendations here. Revel, Polk, Kef come up often. I think your price point is tricky - I don't envy you - cheaper options seem very good, but you do seem to have to go up a price level to get a real improvement.
I'd look for used Revel M16's ... but you might not.
Start with measurements, choose on personal preference.
