I just ordered the Sony MDR-V600 from guitarcenter (
http://www.guitarcenter.com/Sony-MDR...80-i1126814.gc) and am going to return my Sennheiser HD 25 when they get here tomorrow. My friend who has been DJing for over 10 years recommended them over the HD 25s for 2 reasons:
1. They are 100 dollars less
and
2.He has had his pair for over 6 years, they have taken a beating and they still work the same as the day he got them. He had another pair just in case for i tihnk the same amount of time, but those broke just because someone sat on them.
Also, the 600s had a larger frequency response range than the HD 25s (5Hz - 30kHz vs. 16-22 kHz)
I asked him about the Sony 700s you are asking about, and he did not recommend them at all. He did not say why, but I'll ask him when I have the chance.
All in all: Durability + sound quality > Everything else
I know neither of these are what you are comparing, I am just saying to get the Sony's I recommended if you can.
Bookmarks