I had ARCs in a small room and they were never forward or fatiguing. BAT tubes, Nordost, Marantz sa-7. Frankly one of the best speakers I have owned (very coherent) and at times wish I still had them. Placement near the wall is not an issue with that speaker. Do you listen at loud volumes? Maybe listening at levels beyond your room size. Sounds like you like the speaker. I would look for another source of your forward sound.
Dynaudio C1 vs current speaker-Wilson Benesch ARC
Components: Conrad Johnson Premier 350, CJ Act 2 Series 2 Pre, Audio Research CD7, MIT cables & power cords. Stillpoints ESS suspension rack with sound pucks. Room: 12x12. My room is far from perfect. It's my small office with lots of small shelves, but the sound can be amazing at times, depending on the recording. The ARCS are about 7 feet apart, but within a foot from the wall (no choice) and have tremendous detail, have good resolution at the lowest level (#1), but can be quite fatiguing after an hour or so. I listen for 7-8 hours a day at times. Just curious if the C1's would make a difference.