Senn HD650. They simply blow the HD280 out of the water, IMO (I have both).
If you mix through headphones, try these out. Quality and comfort and amazing results, without using monitors.
I use the SENN HD 280s because they are closes phones.......
although the HD 650s are terriffic as an
OPEN BACK set of phones for playing KB etc,.. but IMO for Recording you will hear everything outside of your phones in your recordings and you don't want that at all,..