Tools for exploring spatial hearing - descriptions and informal comments

Microphones

DPA 4560 CORE Binaural Headset

Hooke Verse

Sound Professional MS-TFB-2

Audio Interfaces and Recorders

Sound Devices MixPre-6

DPA MMA-A

Monitors

Other 

Software

Igor Pro,  WaveMetrics -  Favorite software package for sound analysis over the last 20+ years.

Matlab, Mathworks -  Pervasive. Used only when absolutely necessary.