Re: Survey: Best in class headphones - in every price bracket
I'll only list headphones that I've heard, and the only headphone-amp combos I'll insert are those that naturally go together... well... except maybe for the Holmes Powell.

Headphones preceeded and followed by stars are what I would consider super-duper exceptional value.
Band A: Less than US$ 20
Haven't heard any...
Band B: US$ 20 to US$ 49
Again, N/A
Band C: US$ 50 to US$ 99
Sony MDR-E888
Sony MDR-V6
Band D: US$ 100 to $US199
***Grado SR-100***
Band E: US$ 200 to $US 349
Sennheiser HD580/600
Grado RS-2 (can be obtained for a price within this range)
***Etymotic ER-4S***
Band F: US$ 350 to $US 599
Alessandro-Grado Music Series Pro
AKG K-1000
Band G: US$ 600 to $US 999
Grado HP-1
Band H: US $ 1,000 to US $1,999
N/A
Band I: US $ 2,000 and over
Headroom Blockhead / Sennheiser HD600
Stax OmegaII (have only heard 007t tube amplifier)
Sennheiser Orpheus
Holmes Powell DCT-1 / Alessandro MSP or Grado HP-1
That's all I can think of for now. Note I intended these as the best ones, intentionally not listing every single damn headphone that's been mentioned on these message boards that I've heard. I think it's more valuable this way.
Also, notice that there are only two "super-duper" values. I've seen the Grado SR-100 go as low as about $60 which is probably the single best deal in audio I've ever seen. The Etymotic ER-4S, while at a reasonable price, is not such an amazing value for absolute sound but rather for sound in such a small package and for its amazing isolation.