OK, not really sure where to put this. Is there really much difference, price wise, between a lot of the travel agencies out there?

My wife and I went to the Sandals in the Bahamas last year and loved it. Since we are going to be trying for a third baby next year, we want to get another island vacation in this year sometime. I don't know if we can do a full week, but want to do something. Of course, if I ask a travel agent, they'll say they are all about the same. Anyone know if that is really true?

I really liked Sandals, and thought about doing a Sandals in Jamaica, but probably couldn't afford to do the full week. Are there any recommendations on some good, adults only, all inclusive resorts other than Sandals (not just Jamaica) that anyone has been to, or can recommend? Hoping there are cheaper options out there than a Sandals (that's the only one I know of since we've been there).