I am going through Apple. You can check out prices online at applevacations.com to compare hotels. If you are in a charter city, they may have the pricing for the whole package. If it is not up yet, you can select hotel only and compare the resorts. The charter airfare from Pittsburgh is $577.
When I first started planning, I had two resorts picked out (Dreams Tulum and Barcelo Maya Colonial Beach) but when prices came out, those two were too expensive. Then I started looking again and narrowed it down to Barcelo Maya Caribe and Gran Bahia Principe Coba. I decided on Coba since it is 5 golden apples and not that much more (is around $2614 per couple including taxes for Nov 6-13, 200.
My sister got married at Gran Palladium in 2003 and it was very nice. They are also in a reasonable price range.
This site will definitely help you. I also look at reviews on tripadvisor.com (take them with a grain of salt, some people are just complainers) to see what the comments are...plus they have more pics on there.
Good luck with your planning.