Count Florida and Karen, thanks for weighing in on my decision re these two ships. Pros and cons to each. I have received a lot of feedback on the CC board, so that is helpful. The aft vibration on the Nav. won't matter to us as the G-H cabins are at the other end. They are almost the same square footage as the Vista cabins on SS. I did read that one poster's DH got very seasick their last time on the Nav. Now THAT is a concern! I'm sure we will be happy with either choice. If the seas are rocky, it will affect me on either ship.