I do have a 780 so that review should happen eventually.
The D2000 is definitely a full-size can in my book so I decided not to review it. I thought it would be the same size as a the D1100 but it's a good 25% larger. From a fidelity standpoint is is easily superior to the D1100.
How would you say they compare to the M50s in overall SQ? Much more refined with wider soundstage I imagine?