A negative of the DT880 is the lack of soundstage depth compared to other headphones such as the AKG K701. This can be compensated in gaming by for example, on Asus soundcards, using the 7.1 speaker shifter and increase the distance of the speakers away from the dummy head.
+1 this is a great feature.. I recommend testing with the 6 & 8 channel multi layer wav from Microsoft and you will see how useful the speaker shifter is smoothing out the lumps.
http://www.mediafire.com/?zn2f81twfkq2dna (Zip containing 5.1 and 7.1 wav files)