Hi everyone, I have been a member for a long time, but never posted before (the community is so helpful that I always found everything without having to ask questions). I chose my first decent pair of headphones after spending months researching here. I ended up getting the Audio-Technica m50 in 2010. I feel like I am ready for an upgrade - I would like to get something better than the m50 that would carry over the benefits and fix the problems. I cannot readily listen to high-quality headphones before buying them, besides the m50 that I own, I listened to the Sony V6, which I bought as a gift and found very thin sounding, uncomfortable and uninspiring (sorry for the crummy description). I love the m50, the bass is great, they are definitely inspiring and at times sound "intimate". However, after listening to them for more than 1-2 hours I get quite tired (not sure whether it's something in the soundstage or comfort) and they tend to sound confined (small soundstage) at times. My budget is $500 max, I would like to buy something that is an upgrade to the m50, but also compliments it (I will keep the m50s). I listen mainly to trance, dubstep and classical music. I won't be able to get an amp for the time being so I need something as easy to drive as the m50. I also don't need anything portable, and don't mind open, closed or semi-open headphones, although too much leakage might be a problem. So to summarize: - upgrade from m50 - budget $500 - wide soundstage - good bass - comfortable and not fatiquing - easy to drive - fun and inspiring sound, but still preserving accuracy (I don't want bass monsters) - full-sized, open/close as long as they don't leak a ton I want something that will be a definite upgrade, not just an incremental one. I looked at the Beyerdynamic DT 990/DT 880 32Ohm and Denon D2000 (which seem to be discontinued), but I am not sure how they stack up to my needs. Any help will be greatly appreciated!