[ht223]

Hi again, I have narrowed my choice down to these two. Can anyone comment on either of these or the HD 438 which should be similar? The 280 is 4 cents cheaper so price isn't an issue.
 
Also, if there is something else I should be considering please let me know. I have a budget of $100.
 
Thanks in advance.
 
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Edit: Typos.

 

[NA Blur]

The 280 Pro only sounds eh and will break soon after you purchase it.  The HD 439 is a much more neutral sounding and long lasting headphone.
 
Here are the charts:
 
HD-439
http://www.innerfidelity.com/images/SennheiserHD439.pdf
 
HD 280 Pro
http://www.innerfidelity.com/images/SennheiserHD280Pro.pdf
 
The 280 pro has a slight frequency dependance in the impedance curve making them a tad more difficult to drive.  They also have a pretty big initial spike in the 300Hz square wave response showing poor control of the harmonics there.  They are also very seal dependant which can be seen here:
http://www.youtube.com/watch?v=uHkb4bhdnRA

 

[SONIC BOOM]

I prefer the 439

 

[LithosZA]

The headband on the HD-280s can get cracks if you aren't carefull, but the sound is worth it.

 

[XxDobermanxX]

Any of these will blow you away , but comfort wise and for long sessions the sennheiser HD 439 should do