yea. i'm interested in the AF56 as well. but these are already very good for the price
i own the RE-400, too.
(i think Eric would agree on this.) the Audiofly and Hifiman are not comparable at all in sound sign. totally different beasts. Bass VS Neutral (slightly mid-centred). i wont say too much yet, as i just got these, and my re400 are already 1.5 month old, but i find the AF45 to be a great 'FUN' bassy all-arounder