I can prove your room is bad
So you want to upgrade? You want to know what the next big thing is you can do for a better sounding experience?
Try this. Pull up a chair 2' in front of your speakers. If you can't move the speakers, put it up to just 1, and listen for yourself.
The difference between what you hear sitting in front of the speaker like this, and what you hear at your normal location is all in the speaker dispersion and room acoustics. If you feel mesmerized, entranced, and wowed by your speaker at 2' but not 8' you really should consider improving the room, and if you can't, consider getting speakers with alternative room coupling, like ESL's, line arrays, bi-polars, etc.
That is all,
Erik