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My first scope was a 90mm ETX Mac. The views were good through it but dim on deep sky.
I think that a ~150mm Mac is a great compromise for city viewing as long as you can aim it and keep it tracking. I agree with the sentiment that slow mo controls would be very desirable.
The relatively long focal length is better for planets as you don't have to use short focal length eyepieces that are much more difficult to use.
Very wide field will be restricted by the light polution anyway so losing the ability to see "wide fields" is not much of a loss.
Hunting double stars, small planetaries and galaxies plus the planets is well within the capabilities of the scope.
Go for it!
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