I havn't had first hand experience with the Gemini (I use a different goto system), but would lean towards the push to, unless you really want actual goto.
The combination of a set of encoders, and these can either be after market, or the genuine Losmandy, and the spectacular Argo Navis computer is hard to look past.
I am sure you will get some more knowledgeable folk giving advice both ways here,
Gary
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