@mesch I am with those recommending to treat the room 1st. I made my own panels using rockwool 60 in 2x4' sheets 2" thick framed with 1x2" pine and covered with fine burlap fabric.. To start I would place them at the 1st reflection points on side walls, behind speakers and behind the listening chair if the back wall is close. another 1+ regarding room treatment and locating speakers in the room before buying DSP or whatever.
+1 with Mesch regarding building your room treatments on your own. Much less expensive and you build just what is needed for your individual hearing.
+1 on working on speaker location. Never had a perfect room that fit with a golden triangle, etc. You can google this stuff and it is just a place to start. Would recommend checking out Zu Audio speaker placement. They have a slightly different approach and I thought it helped me. Right now, one of my speakers is within two feet of the side and front walls. The other speaker is further out in the room and actually closer to my listening position. The sound is balanced with a wide soundstage. Small tweaks until it is "perfect".
Thanks for listening
Dsper
=-
=+