Closed back headphones are more coloured than open back designs, but also isolate the listener and restrict sound leakage. This makes them ideal for tracking, recording or even just for listening whilst outside of the studio.
Condenser (or Capacitor) microphones are fantastic for detailed recording work. When using them for vocal recording, think about if you need a pop filter (to stop plosives) or a reflection shield to minimise room noise on recordings and produce a clearer result.
All condenser microphones need a power supply from somewhere, either battery or 48V Phantom Power from a desk or interface.