I have been checking out the shorex for this cruise...some pretty good ones available. Might have a go at one or two, I am not a beach person though so will probably stick with the history/scenic ones
I must say that Costa are great in regards to booking cabin extras and shorex...being able to do it in advance and having it added to the shipboard account is so much easier
I will be looking into the X1 package for this one too (needs to be booked via agent and is added to the final invoice for the cruise, not the final account on board).