Sometimes all you need to do is properly place the front speakers to get that perfect sound stage. Move them and listen for an extended time. move them again. Sometimes only an inch or 2 and angle will make or break a great speaker. My proper speakers placement was at least a year in finding! But when I found it, wow! My placement won't be the same as yours: speakers, ports, walls etc.
i have about 25m2 room ,3.5m ceilings. I have b&W 805s, musical fidelity nu vista m3, burson conductor (used as DAC) and auralic aries as streamer.
I was wondering where to dig regarding to the setup of my room acoustic... like using difusers, etc