HD650's would be a good choice. They're not dark at all, not by any standard. Those who say its dark either never heard it, or heard it on bad setups, or they simply don't like a neutral sound that is closer to speaker sound reproduction, but instead they prefer overly bright sound that you get from 90% of headphones. 
Anyway, they work great for electronic music or any bass heavy music. They're not bass when its not needed, they control their bass very well, but when needed, they deliver. They have incredibly strong punch, but very controlled, very solid, and it doesn't ruin the rest of the frequency range. Imagine its sound like a pair of bookshelf speakers + a small subwoofer.
Of all the headphones you mentioned, I'm pretty sure they would be the best. DT880 - no, they're simply too clinical, bright and bass light, DT990 - could work, but still too bright, has slightly recessed mids, doesn't have as much punch as HD650 and overall not as refined. Ultrasone...don't know, never heard any. IMHO HD650 are the most balanced and overall great headphones at that price range if you could get them for around $300, they work great with any genre, just please don't get caught up in the stories of people who haven't heard them and claim they sound "muffled", "like you have a pillow between your ears and headphones", "slow, doesnt work for anything else but classical", etc., because that's all utter nonsense.
Edited by derbigpr - 2/12/12 at 4:08am











