Audiengine reviews
Audio Ideas Guide: Canada’s Hi-Fi and Home Theater Magazine -
Though I personally wouldnt trust this reviewer, because he only seems to be using an Echo Indigo soundcard,
however there is a frequency response graph.
Oh and the frequency response on the A2's is not even close to what I'd consider decent.
The Mackie MR5's look pretty sweet, especially with the two extra nobs to fiddle with, and xlr input...
But I'd rather stick with headphones until I can audition these in person.