I'm sorry, but using reviews and other people's comments on forums is not a very reliable way of picking a hifi purchase that will work for you.
Take the Sennheiser HD700 for instance - try reading about it online.
A lot of people absolutely hate this particular headphone, calling it overly bright.
Other people love it and hear no brightness at all, while yet others hear the brightness but think it's just a plus for them as it makes the headphone sound better in their opinion.
Sure enough, if you look at it's frequency curve at Headroom for instance, you'll see that the HD700 has a treble peak at 6500kHz and another shortly after 11000kHz:
But here's the thing: No headphone is perfect.
And look at the other headphones in the graph above - the HD700 is certainly not the only headphone with "problems" (or whatever we should call it.)
Yet many people love it anyway.
Remember that opinions are subjective and relate to: 1) The equipment people are using with a headphone in question, and 2) Their experience with headphones etc. in general.
So just because one person in a forum thinks a headphone sounds bright doesn't mean you'd think the same if you listened to it yourself in the very same system the other person is using. Or in your own system.
And some people on forums just replicate what they've heard or read, without even having listened to the gear in question themselves!
If you want an advice, I'll recommend that you go listen to gear in shops, on meetings etc.
That way you'll get a much better picture of what will work for you and what won't.
You can also order stuff from shops, but then make sure you pick shops that give you the right to return the item within a certain time frame.
Then you can try it at home which is the absolutely best way of making a choice.
Good luck with you purchase
Best,
Henrik