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Not trying to discourage you, just be aware that it might not be a huge difference. The problem with getting good info is that we are a very small market and somewhat unusual use case.
The 1100D has a 14-bit ADC. I modded mine and it's easily doable (search for Gary Honis' website) and it's quite a dramatic change. I estimate about 1 stop more light gets through to the sensor.
The D7000 has the anti-aliasing filter that was removed on later models (D7200 onwards?), and it will still retain the Nikon LPF which will impact the Ha response compared to the ZWO camera.
I have a Fujifilm camera with this sensor also and it IS a little more sensitive compared to the 1100D, but noise-wise it's not going to light the world on fire in QLD. Fujifilm also use a very mild LPF filter, so the Ha response is actually pretty good. I don't have a Nikon as a frame of reference.
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