My vote goes to the airmotiv 4. I own the Audioengine A2, and the airmotiv5. All of these need a subwoofer if you're even slightly a bass enthusiast. If you're listening to soft folk or light jazz and classical, these things are great. The part that irritated me the most about the A2 is the boom/warmth that comes out of it at 210 to 150 hz. Anything with a male voice, the lower end of a guitar, any part of the drum set, a bass, is alarmingly boomy. Hopefully they fixed this.