The black wrinkle on the Navy ARA/ATA and ARC-5 looks much better than the bare metal SCR-274N, doesn't it? And then to further discriminate, doesn't the ARC-5 have more and more interesting ( and better looking ) accessory items than the ARA/ ATA? For example, the ARC-5 various control boxes and the interesting looking motorized R-26M. -Hue Miller