I remember seeing Saturn through a friend's small refractor and seeing the rings and being amazed, also by seeing Jupiter's moons. The thing that blew my mind most was the first time I saw Omega Cent through a 10" dob.
For better views, dark skies reign supreme, after that aperture and I would think you might find an 8-10" dob an economical way of increasing your wow factor. 8" would collect about 5 times as much light as your 90mm.
And definitely get your wife involved if you can...
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