I had the same dilemma a few days ago because I needed to upgrade from my old 600 ohm AKG K240M's. I had $160 and had the Sony MDR-7506/V6 vs HD280Pro vs ATH-M50 to choose from, I ended up getting the Sonys after listening to all three at the Guitar Center.
Rest assured, the
V6 AND THE 7506 ARE THE SAME THING. (Sound Wise)
I had looked up the comparisons between the two online and many people say that the 7506's have more harsh treble while the V6's are more smooth, however listening to the 7506's I don't find em harsh or fatiguing at all and can listen to them for 2 hours+ without any problems.
The main differences with them are: 1.
Stickers- one has
PROFESSIONAL and the other has
DIGITAL, 2.
Plugs- one is gold, the other silver, the gold might help with corrosion over time though. 3.
Name. 4.
Magnets- The V6 has
Samarium Cobalt while the 7506 has
Neodymium. And lastly, the V6 has a common ground while the 7506 has like separate grounds for each drivers or something like that.
I honestly think none of these things affect sound IN ANY WAY AT ALL.
Now, the sound of the 7506 is love it or hate it,
the treble IS a bit emphasized, this gives it a very live, crispy, in your face sound that some (including me) absolutely love, this made me hear high frequency anomalies in music that I'd never heard before,
if you are treble sensitive,
these are not for you. The mids are rich however the
lower mids are on the thin/recessed side. The bass on these headphones are to die for. The bass has lots of oomph and punch while displaying control while still being able to reach very low.
These are also some of the most comfy headphones ever, the clamp is just right, the earpads are so soft and the cups cover my ears perfectly.
For the price, I don't think they can be beat, I tried out the 280's and while they're a bit more neutral, they sound a bit too congested for me and though the bass does reach lower than the Sony's the higher bass is very recessed.
Honestly the Sony's are the best for only $77 right now on B&H, Guitar Center price matched it for me.
TEAM MDR-7506!