I really like them, in many ways they are simply phenomenal, but I don't think they are ultimately what I'm looking for. Somehow they tell me far more than I want to know, though I needed to try them to find that out. I can't explain it, but I found their astonishing openness and clarity intimidating somehow. I suspect I'm far more 'pipe and slippers' in what I'm after! I've never liked a bright or spotlight on anything, I'm more into 'big music somewhere over there' - I love scale, weight and realism, but don't like to be distracted by image, mic-placement etc etc.
On the right material the MEGs are startlingly good, e.g. I've never heard any system in my life do acoustic guitar the way those things can, it's just real and straight in front of you, but throw a grungy old mono cut at them and it won't be on for long, they just show up too much. They also really set-off a room-node too, I think their port resonance is bang on that for my room - they can boom quite badly on some electronica that the Tannoys sail through without issue.