Haven't hear the Airwave HD myself, though I'd love to read your impressions.
The only portable Bluetooth speaker I've listened to that truly impresses me with its "pow" is the Bose SoundLink Mini. I'm rarely shocked by audio gear, and generally vastly skeptical of the hollow marketing behemoth that is Bose, but this one really got me. Whatever digital signal processing it subjects the music to in order to make it sound so full-yet-natural from such a compact frame is quite special (as in, it actually avoids the common DSP pitfall of degrading the music in an attempt to make it "bigger"). This is in contrast to the other portable speakers in my stable -- the TDK A33, G-Project G-BOOM, soundmatters foxL v2 Platinum Edition, Soundfreaq Sound Kick, and JBL Charge -- all of which have their sonic merits (and many of which are bargains for the sound they produce within their price brackets) but fall to the SoundLink Mini overall.