Many people here wanting to throw equipment/$$$ at a problem without completely understanding the problem first IMHO... It's akin to mechanics who simply replace parts without doing thorough diagnostics.
@sgordon1 has the right idea: Get an ear exam. Fully understand what your ears are really hearing, or not as the case may be. Then you can start working on a solution be it, EQ, room treatments, whatever.
That reminds me, I need to get an exam as well. I'm not getting any younger!
Happy listening.