Hi Bob,
depends on how keen you are.
the QHY8 would be the best place to start if your using it purely for astro since its cooled and it doesnt have a front filter blocking most of the Ha emission line. unmodded DSLR's can still give good results but i dont think anyone will argue that a QHY8 will do much better.
im not sure about being easier to use straight off the bat but its not overly difficult to work it out plus Theo is very helpful and theres a bunch of QHY8 users on this forum if you run into trouble. once you get everything set up though its pretty simple to use.
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