I have more noticeable tinnitus in my left ear vs the right and any bright sounding system will cause me to turn down the volume if my system isn't set right. I recently moved to a new home and just finally got around to using the Audyssey software on my Marantz receiver to "correct" the speakers to my listening space. A vast improvement. I tend to EQ my treble flat and bump the midrange a bit and I never listen to music at high volume for extended periods. Typically I might crank it for a particular song but then dial it back down.
Your setup sounds like it is too heavy on the treble end and the brightness is causing you issues. I would suggest listening to music w/ flat/neutral EQ settings for a while as you address room treatment. Then make adjustments after that. Not sure that you need to run out and start equipment swapping if you haven't fixed the room first and made adjustments to what you have on hand.