If you have already got the 90 ETX on order then wait and see what it will do, it will give you great views on the planets,and your wife will have no problem setting it up for you.
You asked the question if it was better to upgrade, well if the 125 is to big then don't get it.
The best telescope is the one you will use the most.
When you post questions, maybe include more info on your needs and capabilities so the rest of the community can respond more directly

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Regards Matt.