Audio Advisor has demo headphones, including the HE-560 for $791:
http://www.audioadvisor.com/HiFiMan-HE-560-Headphones/productinfo/1HMHE560/#.VAfxNbGFnOs
LCD-2 for $1,751;
http://www.audioadvisor.com/Audeze-LCD-3-Headphones/productinfo/1AZLCD3/#.VAfxcbGFnOs
LCD-2 for $896:
http://www.audioadvisor.com/Audeze-LCD-2-Headphones/productinfo/1AZLCD2/#.VAfxy7GFnOs
Focal Spirit Pro for $307:
http://www.audioadvisor.com/Focal-Spirit-Pro-Headphones/productinfo/1JMSPIRPRO/#.VAfx7LGFnOs
http://www.audioadvisor.com/HiFiMan-HE-560-Headphones/productinfo/1HMHE560/#.VAfxNbGFnOs
LCD-2 for $1,751;
http://www.audioadvisor.com/Audeze-LCD-3-Headphones/productinfo/1AZLCD3/#.VAfxcbGFnOs
LCD-2 for $896:
http://www.audioadvisor.com/Audeze-LCD-2-Headphones/productinfo/1AZLCD2/#.VAfxy7GFnOs
Focal Spirit Pro for $307:
http://www.audioadvisor.com/Focal-Spirit-Pro-Headphones/productinfo/1JMSPIRPRO/#.VAfx7LGFnOs