I was thinking the same thing. And was going to post. Then I thought I was missing something.
At this stage of the game we will all have about 15 cities on the island to hide troops. Best to dodge on our own island for quick recall. Unless your a uber dodger and want to send your troops out on a 4 hour journey while you sleep.
Well thanks everyone for their contributions.
I will go for harbour (cheap) and then maybe Market. This world is so quick I should be able to get 1.25 ratio for trading with villages at least once a day.