The SR80x is the second model up in the range and is very highly regarded. It maintains the simple 'rightness' of sound that the remarkable SR60X has, and primarily adds a bit more resolution to the sound.
Product Specifications:
Transducer Type: Dynamic
Operating Principle: Open Air
Frequency Response: 20 - 20,000 hz
SPL 1mW: 99.8 dB
Nominal Impedance: 38 ohms
Driver Matched dB: 0.1 dB