You honestly need to listen to the headphones in order to find out what you like.
I can't emphasize that enough.
If you know your preferences already, describe them to us.
Even then, you really won't know until you try the headphone...will you? No matter how much we might like to think that we can objectify the subjective character of experience, it's just not possible. We will never know what it's like to be a bat; we can imagine ourselves as a bat with a radically different system of sensory perception, but we will never know what it's like to actually be a bat. Similarly, we will never know what it's like to be you, nor will we ever be able to fully characterize how you perceive reality; your subjective character of experience eludes our grasp. Thus, there are some types of knowledge that exist that we can never know.
Talking about "what headphones are best for you" is a lot like, well...
It's like starting a thread over whether apples or oranges are better.
I might write a thought-provoking and ultimately persuasive argument that convinces you that apples can seduce the most hide-bound taster with their sweet succor...but then some other person will interject that oranges provide ancillary benefits such as Vitamin-C, which would nourish you back to health from illness and provide the same sweetness. Then I will rebuke his spurious claim by citing that although their citrusness does indeed yield innumerate health benefits, it is not worth compromising taste, for oranges are known for occasionally being too bitter or too sweet. This can go on and on, ad nauseum, until one of us exhausts our attention span and begins devoting our attention to something more deserving of our time, like watching paint dry.
This exercise in pointless discussion is bewildering even to someone who has tried both apples and oranges, one after the other...I can't even fathom how a person who hasn't tried apples or oranges would react to this litany of contradictory information.
This can go on for days, weeks, months, even years...in fact, entire forums, such as those at
www.head-fi.org , are founded on the principle that people are stubborn and petty enough to argue over why their headphones sound better than someone else's...or how some headphone their lusting after sounds better than their own or someone else's...or even more humorously, how someone else is hearing something "wrong."
That being said, I think the MS-2s complement the ATH-A900s better than the HD650s.
MS-2s = no soundstage, lots of impact, liquid mids, rapid transients; HD650s = soundstage, like the ATH-A900s, more laid back, a more subued, darker version of the ATH-A900s with more clarity and resolution.
But yeah, hit a meet and try the darn headphones to see if you like them...ignore my philosophical ruminations.
