The Bauer s709xl has a good crisp lens and has great low light capabilities with it's max f1,2 aperture and 200 degree eXsiting Light shutter. You can shoot Vision3 200T with this camera both indoors and outdoors on full auto exposure and get great results. You can also shoot Vision3 500T but you have to dial in the exposures manually - the camera has a max ASA/ISO sensitivity of 160ASA tungsten - so 500T will be overexposed by this camera by just over 2 full F stops. So if you are shooting ion really low light situations you can hold the iris wide open at f1,2 and get great results.
You can do the same with your two Nizos - however they are crap in low light.
I recommend shooting Vision3 200T with your Bauer outdoors using a screw on 85b or KR-12 filter and disengage the internal filter. You will get better results.
Hope this helps.
J.