re: Camera Recommendations

Yup, Moke and I pretty much agree on everything we mentioned.  I run APS-C simply out of cost at the time when I bought it, I'd love to go full frame in the future I just don't have the money to sink in it right now.  My video cameras are Blackmagic Pocket Cinema Camera 4k's which are MFT.  That's briefly caused me to swap my Nikon D5300 for a MFT camera, just to be able to interchange the lenses better as I look to get more MFT glass.  But I don't know that I see myself actually going down that route, because I'm more chasing f-stop range for what I do... 

Dave brings up a good point about the focal length (and consequently calculated f-stop) when going with a smaller sensor.  You can play games with that and speedboosters if you wanted to as well, going from full/crop sensor lenses to MFT, for example.

But simple answer, easiest to stick to one of the cameras we mentioned, if not buying new lenses or adapters is the goal