Here is a headset that provides you with a rich FPV experience of all the action. The Marvel Vision Goggle has a 4.3″ monitor and a 5.8GHz receiver. It displays real-time video from your camera. The headset weighs only 380 grams.
The headset has a 2200 mA battery, which lasts 1.5 hours. Costs under $120 at this time.