Check with your preferred insurer....it's possible you might have difficulty securing insurance for a boat that is older than 20 years, or at least pay a higher premium.
I would also consider storage volume, especially for scuba gear (not sure how many sets you will have on board).
My vote goes to the newer model, although I think Catalina, in general, probably sails a bit better than Hunter. Even more, there are so many hulls available 27-30' range, 10-20 years old....I bet you can find a few other options the exceed both of the options you're considering.
I would also consider storage volume, especially for scuba gear (not sure how many sets you will have on board).
My vote goes to the newer model, although I think Catalina, in general, probably sails a bit better than Hunter. Even more, there are so many hulls available 27-30' range, 10-20 years old....I bet you can find a few other options the exceed both of the options you're considering.