Sennheiser HD-26 Pro

The HD26 Pro are similar to the classic HD25 with 2 main differences.
1. They are more comfortable on my head and the automatic headband splitting mechanism works like a charm. You can eliminate it with provided single band if you got used to a single headband.
2. The hyped sub-bass frequency response is something that needs to be considered. If you work with inaccurate boom operator you will hate him for nothing as you'll hear excessive handling noise which is not really that bad if were auditioned on a regular HD25 headphones.
At the same time it could be a great benefit if you need to compare two sources looking mostly for the low end.