If your choice of Celeb holds you're limited on the west coast to less than a handfull of dates and 14 to 15 day sailings. All of these go through the Panama canal and give you both the Mex Riv and Carib. One goes the other direction from Ft. Lauderdale if you'd prefer.
Those itins will definately limit children. There is not a large market for cruises of this length and cost from cruising familys.