B.C.
I'm a bargin hunter and was taught to be one by my mom. If you are getting prices of $1500 to fly down, you must be going first class. My wife and I spent 8 days at an all inclusive resort in Mexico for $2400 for both of us at a 5-star and that was for a suite, including all you could eat and drink and it included airfare. We had a wonderful time.
Try these websites:
cheapcaribbean.com (Current special: Marriott Frenchman's reef resort, USVI St Thomas $504, 5 nights including air, ppdo.)
cruisedeals.com
gate1travel.com
lowfares.com
mailpound.com
vacationoutlet.com (They currently have a special: Hawaii, Ohau, 5 nights and air for $699 ppdo.)
Tahiti has some real good deals coming up too.
Good luck to you and yours.