Also from my experience:
Open Air is better for Music and Movies. It really brings your music alive, regardless of what brand you choose.
Closed is much much better for gaming. I wouldn't use Open Air for gaming. You need the isolation and the spatial directional sounds much clearer on closed headphones.
Considering that the HD595 are Open Air.
Why wouldn't you try the AIR, Air Dynamic Headphones series from AudioTechnica. For the HD595, I read that the AD700 are a great alternative. For some they prefer it. You'll also find that there are comparisons that say the mid are much better on the AD700s.
My Suggestion:
Music and Movies: AD700 or the HD595
Gaming: A GAMING HEADSET, One Made For Gaming, Made With Gamer's Experience and Consultation....Hint Hint Hint. If not, try the Senn HD280
Or as others have suggested, the A900 might be your best bet for one single headphone