Speakers or room

Change rooms, go to smaller, dedicated room for music,
where you will have better control of more variables.

Change furnishings, floor covering, wall treatment, in the large room.
Secure meaningful compromise with wife, and
change speaker placement, moving them closer to the front wall.

Go to a headphone system.  Spend less money, get better sound, and
leave the room alone.  Invest in a special chair.

Talk to GIK Acoustics. They have some very pretty panels, including custom art panels.

Always start with the room, IMHO. A good room is more speaker forgiving.

GIK Acoustics is really a good choice.