OT: kind of, headphone search source?

[Linux for blind general discussion]

Hi folks,
Let me ask this clearly, or as clear as possible laughs.
what I am seeking, even if a store that I need not buy from, is a resource 
where I can choose
  a set of headphone specifications, and get a list of prospects.
I use them in different environments, and have some rather detailed needs.
Being forthright I often find a match and keep buying them as long as 
possible, making it really depressing when a pair gets discontinued...I am 
talking about you JVC ha-s44x *sniff*.
Ahem, in any case ideas for a location where I can  shop with this kind of 
detail?
Thanks very much,
Kare