Five months ago I was looking for the Elan 30. They weren't on stock so instead I auditioned the Epic 5 (later on, I purchased Elan 30s) . The main difference is the resolution, more details were retreive by the Elan 30. The Epic 5 is more wall and space friendly in contras to the Elan 30. My room is approx 5x4 metters, Elans are 30 centimeters away from the wall and the space is fool of sound, sometimes to much bass load is produced. Epic 5 is easy to possition. It is really suprising how such a large speaker goes well with the small space producing no sound distortion. In short, 15-20 square metters - Elan 15, you'll get fine resolution and real musicality. 25-30 square metters Epic 5, you'll get less detail but get the authority and fine, easy to listen loudspeaker. I prefer funky.