get the camera with the best quantum efficiency and lowest read noise. 8 bits are enough, you don't really need cooling and framerates above 30 fps are useful. The ZWO ASI120 seems to be the most popular at present, but the QHY5L2 and DMK21618/Flea3 are also effective. Lumenera have a bit lower quantum efficiency, but have relatively low read noise and would still be OK for a larger scope. Used to be that you had to spend a lot for a good planetary camera, but the ZWO and QHY CMOS cameras changed all that.
work out the required FNo for the scope/camera combo and adjust with an appropriate Barlow. A simple calculation will find the optimum for any scope and camera
http://www.iceinspace.com.au/forum/s...d.php?t=105057 If you get an f10 scope, use a 2x Barlow with the QHY and ZWO cameras or a 2.5-3x with the 618.