In the spirit of OCD, I just recovered my bass traps with a more appropriate fabric from ATS Acoustics. I used their Guilford of Maine Sona Acoustical Fabric. I had previously used some generic fabric from Joann Fabric because they were out of speaker fabric.
We just had to replace both of our 24 year old HVAC systems (downstairs and upstairs). I think maybe a new listening chair may be out of the question for a while.