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Hi Richard
As those have said already, portability is a key consideration here, and you've already expressed awareness i.e. you don't want it to sit around unused. The Espirit 150 is without doubt one glorious scope, but at a price which not just dollars - the OTA alone is close to 15kg. To me, it would become quite the chore/disincentive in having to set up each time, although you seem to feel differently.
Then there are others on your list, e.g. the 7 inch Questar Maksutov - don't those things have a focal ratio near f/15 or so? The range and cost of eyepieces needed if low power takes your fancy, starts to emerge.
There is a lot to weigh up here, especially when comparing such different types of scopes. Have you had a scope before, long term? If so, may we ask what is was/is?
Look forward to seeing what you decide,
Cheers
Fox
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