[pearljam50000]

Ok,i narrow it down to these three.
All are close,all cost almost the same.
Which one is the best?
Looking for a detailed and neutral and natural sound,similar to Sennheiser HD800.

 

[PurpleAngel]

It would be helpful to know what source(s) the headphones are going to be plugged into?
Are the headphones for just music? or movies? or gaming?

 

[pearljam50000]

Just for music
They will be plugged into a budget DAC\amp.

 

[PurpleAngel]

  Just for music
They will be plugged into a budget DAC\amp.

Which budget DAC & amp?
The 32-Ohm K550s and 42-Ohm SRH-940 would be best with a low impedance headphone amplifier.
(portable stuff is usually low impedance)
 
Where as the 250-Ohm T70s are great for receiver or a decent headphone amplifier and would be fine with a headphone amplifier that has a high output impedance (but a low impedance amplifier is just fine to).

 

[Lilac1]

I'm also wondering about this. I'm looking to replace my K550's due to an unnatural treble and otherwise "thin" sound. Their soundstage is excellent though