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another vote for the ASI1600/QHY163 Tim. You don't have to run these cameras in low noise mode if you don't want to and can happily make one work just like a very low noise 8300 (with 16mpix) by choosing zero gain. There will be somewhat lower signal than an 8300 due to the smaller pixels, but on the upside there will be a significant improvement in resolution if your scope is good enough quality.
FWIW, my 1600 has worked perfectly since the initial software wobbles (interacting with SGPro) were sorted. Agree with Glen that the dew heater was a fix for a non-problem - marketing.
Seems to me that we have entered the era where the astro camera has become a lowish cost consumer commodity - sounds too good to be true, but this particular CMOS chip really does provide better performance at a much lower cost - has to be a good thing.
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