I owned the 228be and McIntosh 462 (picture under my profile). The only thing that matters for power is listening distance and sensitivity, Not room size. At 10’ you can’t be using more than 5-10 watts at ear bleeding volume.
the 228be lacks bass extension and need some room gain without subs. If you move them out from the wall you will lose some bass unless you move them 8’ into the room. That is just based on 1/4th wave cancelation.
I also have a large room. 26’x30’ with openings that effectively extend the room to 40’ in length. I have tried the speakers 8’ into the room with my seats 10’ back. This still left 12’ behind me. This was a very good sounding setup but does not work for my video and I moved them back to 4’-ish feet off the wall which works well with subs highpassed but would cancel 60hz if not high passed….
anyway, moving speakers is free. You will lose bass between 3’ and 7’ off the wall. Once you are over 8’ the bass will come back and the soundstage will be better (deeper). At that point it is just a matter of balancing room modes and nulls.