How noisy is your apartment? When you sit silently for a bit and focus on the background noise can you detect things like a fridge or HVAC?Background noise even at moderately low levels that are hard to notice by ear can be effective maskers.
In general, is it possible to pull the off axis response along a different plane than horizontal and vertical from NFS data? I’d be curious to see that with and without normalization for a well behaved speaker like this vs one with a messy crossover.
These are all excellent speaker options. That being said, changing speakers will not significantly impact the muddiness. The space appears to be relatively reverberant.