For headphones under $2000 here's what you need, two from all the big players
, mind you, you still need a to sell a kidney to afford all of this but that's why god gave you two of 'em right?
-AKG K1000 Balanced Black Dragon
-AKG K701
-Audio Technica ATH-W2002 Japan
-Audio Technica ATH-L3000 Balanced Silver Dragon
-Beyerdynamic DT770 Darth Beyer
-Beyerdynamic DT880 Darth Beyer
-Grado Labs Alessandro MS-Pro
-Grado Labs HP1
-Sennheiser HD650 Woodied Balanced SAA Equinox
-Sennheiser HD595 Cardas Balanced
-Sony MDR-SA5000 w/recable
-Sony MDR-HP3000
That'll keep you satisfied for a long time, now lets move on to amps...
For us normal people, all around $500 or less;
-AKG K701
-Audio Technica ATH-W1000
-Beyerdynamic DT880 Darth Beyer
-Grado RS1 (used)
-Sennheiser HD650 w/recable
-Sony MDR-SA5000