Why are you going with a 8" f4 or f5. Based on what I read an ED80 or ED100 at a fraction of the aperture does the job. So a smaller newt might work just as well.
I've just bought an EQ6 Pro but will use, at least for the meantime my 4.5" (114mm) F8 Newt with a NexImage SSI cam to get started. I'll look at other options when the bank balance recovers from the mount.
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