Hi all,
 
I am moving to a new office that is much more open than the one I am currently in.  I am looking for a good pair of headphones that do not leak sound.  I am not looking for IEMs.
 
My favorite headphones are my Ultrasone Pro 900s.  I wish I could have these with no leakage but that's not possible.  I have an old pair of dt 770 pros that I enjoy as well.
 
My budget is up to $400..  Are there any suggestions?  I would be driving them with a Fiio e10k.
 
Thanks

M-Audio Q40.  Put HM5 or 840 pads on it since the stock pads leak a bit.

I know that this is on the lower end, but you could snag some SHL 3300's and put hm5 leather pads on them. They are not glued on- easily replaceable. I heard this combo and it's MUCH better than stock, and is pretty clear/decent soundstage for a closed can. Total cost is around $40-45. The only other closed headphone to compare with was the 280 Pros, which wasn't even in the same league, after pads.
 
You can try this combo, and maybe you won't have to spend up to $400. Worst case scenario, you'll have a good backup/throw around pair...or just send it back.

Looking for a little bit better quality headphone.  Anyone know if the Sony MDR-1A leak?  I keep reading differing opinions