I will start by saying that I am no sound technician, nor musician, I am just someone who enjoys music.
After reading a lot of reviews on the internet and many hours of searching, I decided to order the DT-880 and the Sennheiser HD 650. I wanted a pair of headphones that deliver clean, and warm sound at a reasonable price but I unfortunately ended up sending back both.
For me the HD 650 sound perfect, the highs are there and they are very clear, the mids and the lows are great. Not to much bass, not to little, just enough to move you.
The problem I have with them and the reason I ended up sending them back is because they weren't comfortable enough for me.
They clam to hard and the headband didn't feel soft enough. I found myself focusing more on the pressure they exerted on skull and ears instead of enjoying the music. I could not bear them for hours, that is for sure.
I now know that the ideal headphone for me would sound like the HD 650 but have the comfort of the DT-880. I don't know if they exist but I sure hope they don't cost a fortune. :)