My husband and I are desperately needing a vacation, maybe a week long. We could go on this vacation any time between late April through maybe Oct 2013 if needed. We have been to Mexico and would like to do a different location this time. We fly out of the southeast (maybe Atlanta), so flights are no real problem.
We would like to go somewhere with an active night life (either very near or even at resort itself), adults only (as we like to enjoy our vacations without running, screaming children kicking water and sand on us) and maybe all-inclusive. We like to be at the beach with a really nice pool and have a nice pool or swim up bar. If it had some activities at the resort or very near like, snorkeling, boating, volleyball, massages, maybe a little shopping (for souvenirs), seeing a waterfall maybe or something, that would be great! We want to hang out with other people there and socialize at activities and at the pool; not isolated and dull.
We want something fun, warm, tropical, beautiful, a little romantic, great sandy beaches, (and not in a real scary location) and memorable (in the best way) as this will be like a 2nd honeymoon for us.
What ideas/suggestions do you have? What location should we choose? Why? What hotel/resort? Is there one time to go that will be better than another? I appreciate all comments, as we want to reserve something in the next cpl of months, but am stumped right now.
HELP!!!!!

If it helps, we have looked at a lot of places like, Couples Resorts, Beaches Resorts, Club Med, Hedo, and such. I want the opinion of the experts, YOU, and help me to fill in the blanks of where I should go, when I should, etc. Thanks so much for all of your help in advance. I am willing to pay maybe $4-5k for a vacation if needed.