Always go for better speakers first if your existing speakers aren’t ’I think I’m done’
No audition these days (in any case you need to hear them in your space), go for returns accepted’.
ANY speaker, my recommendations:
No ports, if so front only.
Reasonably away from corners.
Tilted back slightly so the angle of dispersion is not parallel to floor/ceiling/side walls
Then tweeter aimed directly at ear height when seated.
Toe-In, each side aimed directly at single listening position, to maintain high frequencies which have narrow dispersion both horizontally and vertically
Listening distance a bit further back than the width between the speakers.
Ability to alter toe-in if you listen with a friend: say a small drink table between two chairs. aim left speaker directly at right person, right speaker directly at left person. That gives somewhat decent imaging, hearing both l and R results by the mix of increased direct dispersion opposite side with more volume of closer speaker.
Note: you might try the above with your existing speakers first, hear what I suggest.
IF subs to start or later: a stereo pair, front firing, located near primary. Very low bass is mono, but the overtones quickly become directional.