Gizmodo published a very cool video showing off the most popular 360 cameras that are available on the market right now. Quality and price varies but all I can say that the winner here is the PixPro SP360 4K. It delivers the most sharp video and has the option of using a dual kit to eliminate the blind spot. Watch the video below and see for yourself:
Theta S Dual Lens, 190 degree, 1920 x 180 pixel res. no blind spot
Bublcam Quad lens, 160 defree per lens, 1440 x 1440 pixel res. no blind spot
360Fly Single Lens, 240 degree, 1504 x 1504 pixel res. blind spot visible
PixPro SP360 4k Single Lens, 235 degree, 2880 x 2880 blind spot visible
$900 optional Dual Kit no blind spot.