Long keel or Fin

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We are currently looking for a suitable 30-40 foot sailboat for livaboard /bluewater cruising.
Right here's the million dollar question, do we look at a good steady seaworthy but slower long keel or a fin keel which will hopefully sail faster and get us away from any approaching bad weather.
I appreacate we will at some time get caught in bad weather and as such needs to be taken into account .
We have no plans to do any racing in the near future.