GASP Lab supports a wide variety of cameras.
CCTV cameras - Capture at 25 fps but do offer entry level prices and reliability.
USB 2 Cameras - Capture at 60 Fps however they tend to produce a dark image and frame rates reduce when you add additional cameras.
USB 3 Cameras - Produce the best possible images as high as 4K. With GASPLab 64bit taking advantage of the ram in the computer high frame rates up to 750 fps are obtainable at reduced resolutions.