Pepp,
I owned 4JRs for a long time and had them on a long wall, (actually I think my system pics haven't been updated so you can look). As you note, this makes you sit pretty nearfield which forces you to bring the speakers closer together. This sounded really great except the soundstage depth suffered I think, at least in my case because I was forced to have my equipment furniture between the speakers. In my original demo at my dealers house, he had them short wall with nothing behind them and the soundstage depth was amazing. Although I enjoyed them on the long wall, I really would have wanted to put them on a short wall. It sounds like you may have some optionality so spending a weekend trying both ways may be worth the effort of repositioning speakers, which by the way is critical. Best of luck.
I owned 4JRs for a long time and had them on a long wall, (actually I think my system pics haven't been updated so you can look). As you note, this makes you sit pretty nearfield which forces you to bring the speakers closer together. This sounded really great except the soundstage depth suffered I think, at least in my case because I was forced to have my equipment furniture between the speakers. In my original demo at my dealers house, he had them short wall with nothing behind them and the soundstage depth was amazing. Although I enjoyed them on the long wall, I really would have wanted to put them on a short wall. It sounds like you may have some optionality so spending a weekend trying both ways may be worth the effort of repositioning speakers, which by the way is critical. Best of luck.