In a previous thread, someone went into great detail about the different classes of ships, such as the Millenium class. Which ships are in which class? The two cruises we are looking at are aboard the Constellation and the Mercury. I was particulary intrigued about the dance floors - my husband and I love to dance (slow, not disco). So we like the idea of several places to dance. We also envision sitting around in the sun by the pool - is the number of pools different by the type of ships? I've heard great things about the Celebrity line. I've previously cruised on HAL and NCL. We are only in our early 50s but liked HAL because it was elegant, not too crowded and had good dancing. We found the food to be pretty good but my husband is not into gormet, give him a good cut of steak and he's happy. Any information would be apppreciated. Thanks.