Try 'em on the long wall. Not because they will for sure sound that much better, but because you can tell your brother you tried it and here's what you found. And, just to try it.
None of us can really tell you exactly what's gonna happen when you move those 60's over there. You could always try wider speaker placement - short or long wall - and that may widen your soundfield a bunch. You can for sure sit in a nearfield position with those 60s, but you still might get quite the "slap" reflection from back behind you with them on the long wall. I see room treatments coming...
The big thing is to just try it - to silence your brother, and to try it for your own knowledge and experience.
None of us can really tell you exactly what's gonna happen when you move those 60's over there. You could always try wider speaker placement - short or long wall - and that may widen your soundfield a bunch. You can for sure sit in a nearfield position with those 60s, but you still might get quite the "slap" reflection from back behind you with them on the long wall. I see room treatments coming...
The big thing is to just try it - to silence your brother, and to try it for your own knowledge and experience.