I don't think we got much of a preference for any tech ourselves. There is an excel shart somewhere out here that tells the likelyness of the AI researching each tech. The only thing i remember is that the AI will almost surely research Gunpowder and i think also Invention. We should find this chart and just research that was is least likely to be researched by the AI.
I have just calculated, at this moment, we have 6.56 uncorrupted shields in SF, rounded to 7. Every small bit of extra corruption will make it 6. That will be quite costly for us, it will increase build time with 2 turns.
Also, even if we get that city, we cannot do much there. It is a small island. We need to build a second city to get those horses. 2 cities there will increase the corruption by 6% or so for every city in our second core. And horses we can get from the Chinese anyway. The corruption in those 2 cities themselves would be rather high as they have a bigger distance and no connection to the capital until we build a harbor there.
So all together, i think that city will do more harm than good.
On top of that, we have probably significantly less than 10% chance to get a city there, so i would not go build culture for a small chance on something that might do more harm than good.
Edit: And here is that chart:
http://forums.civfanatics.com/attachment.php?attachmentid=73596
http://forums.civfanatics.com/showthread.php?t=104456
Some more about that excel thing:
On top is a number that is 10 by default. This is the the amount of turns per base cost needed for the AI to research a tech.
If it researches a tech in 10 turns that has a base cost of 40, enter 0.25 (probably a realistic number for MA now)
This number is a huge guess, but luckily it doesn't have a great influence on the results.
Feudalism is a huge favorite indeed. For Greece it is less of a favorite, but it still is favorite for Greece as well.
Mono and Engineering doesn't make very much of a difference.
Invention, Gunpowder and Metallurgy are almost sure to be researched by the AI when they can.
Other than that, significant (but not as huge as the former 3) favorites are Astronomy and Magnetism.