on paper, the MoFi is a much better value. However I heard them and I was not impressed (which could be irrelevant, could have been the room, the setup, break-in, etc.)
Harbeth is about impressive midrange - again, anecdotally - the good news is, if you are set on these two, you only have to listen to two speakers which is doable/feasible, don't listen to a bunch of nerds, listen to the speakers :)