Hmm. just pulled the trigger on the b&w dm303. 72Hz -- 30 kHz. I'm thinking that frequency specs aren't everything. But, maybe if I actually listen to the iPod Hifi, the audiophile scales will fall from my eyes.
I'd like to see a review of the ipod hifi, vs that 50/watt onkyo. Feed the onkyo with an "airport", and compare which does a better job of rendering those mpeg4 files.