I'm not going to go in full detail here, I'll save that for the review.
Overall the MA900's have a laid-back, warm sound signature (HD650 comes to mind) with VERY smooth treble compared to the DT880's. The midrange is simply awesome, and the soundstage is phenomenal for gaming.
Some complaints: The cable is pretty thin, gives an impression of a cheap headphone. Typical Sony build quality (which is a joke compared to the Beyers). Sub-bass roll off, maybe this will improve with more burn in?
Other than that, they're excellent for the $170 i payed for them.
Wait for the review guys, i have a ton of things to say about this headphone :D
Look forward to your review. If you could provide a link here it would be fab :) I've been reading some more reviews of these and I'm still very interested, seems they have good tonality as well.
Ok I'll stop now :D
Though they might appeal to you too pp; warm, massive soundstage (good for orchestral) rolled off treb...
Right seriously I'm going to stop talking about em now.