I have a pair of DT880 pros. Not too bad, comfortable - but they are not exactly flat. I use a MOTU AVB unit and it has more than enough power to fatigue my ears fast. The open back helps a bit with bass build up, but the ear mind thing could not 'learn' how they translated into the mix all the time.
I picked up a pair of DT1770s and somehow, they clicked with that ear mind thing. When I hear something in the mix, I know how it might translate to a variety of devices. They have a nice wide stage, fairly even response, comfortable... Not top end mind you, but they are pretty good for the price. I think they are worth checking out.
Like others have said - I prefer using both monitors and headphones.
LL