Koastal if I were you I would be going 150's in Yam or Merc but you are crazy to be repowering here if you are getting a boat shipped over. You could save thousands by buying new motors in the states, leave them and the rigging gear in crates and have them put on the back of the boat for the trip over.
Is it in transit yet? Certainly worth your while to buy in the US as it wont cost you any more for shipping surely.