Opinions: Celebrity Constellation or Sun Princess

[cdnliving]

Hello...First of all To all of you who participate in these boards....you are a wonderful wealth of knowledge and have all been most gracious in your replies ...we are now more excited about our first cruise than we thought we'd ever be....so thankyou for that!!

We are interested in both of the above cruises, based on everything you have all shared - they both sound wonderful...each in different ways. We are travelling March Break with our two children 12 & 10 and would like an upscale cruise, activities for all the family, good entertainment, and dining. Each of these fit the bill, however from those of you who have sailed both lines, which would you recommend:, on the basis of childrens programs, entertainment and a livelier vibe (ie. one night in the disco!)?