If price is not an issue then I'd agree with Lewis, go the Tak or maybe the TeleVue 85.
If budget is more of a concern, I'd consider the Orion ED80T CF. It has a carbon fibre OTA, 480mm FL (down to 384 with FR), FL-53, and the Crayford is robust when locked. As my first entry into the world of apos, I've been mightily impressed with mine. I'm now looking to expand in the other direction and get a 900mm FL medium FOV apo to add to my arsenal!
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