The ST402 is still the go with its great QE. With my RC-PME rig and the 402 attached by a MMOAG off axis guider, there is always a guidestar on the chip (I generally use longish guide exposures to smooth out corrections Vs seeing). It seems to be the industry standard in this configuration with big RCs (etc) and Paramounts. That said, I'm using a Remote Guide Head & OAG with my STL6303 at the moment - I'm now using the 402 elsewhere. I had a dodgy power cable too - reliable once that is fixed.
Mike's H9 camera sounds good as well.
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