Best headphones?

I have been very happy with my Sony MDR-V6's. They are the compact ones with aluminum speaker enclosures (not plastic). Consumer electronics stores usually do not carry them, but you can get them from Guitar Center (about $100). I have had mine for 9 years. Very neutral and detailed. They are also fairly compact, and comfortable to wear. I have noticed many recording studio photo's where engineers are using these.

I have definitely heard better than the Sony's. One of my co-workers had the old stax electro-static-on-your-ear headphones with the dedicated amp. Those were the best sounding I have heard (at $2000 in 1993 they should be!) I once heard some of the sennheiser midrange ($125ish) and I thought they were very detailed and airy sounding. I like the Sony's better because of their relatively small size. Has anybody out there heard the sony nc-20 noise cancelling models ? ( the msrp 200 one )