We honeymooned at Couples Negril and we will definitely go non-AI (at least part of the time) for our next trip. If I were you, I would consider going non-AI and I'm sure that lots of other posters will respond with information about non-AI options. I'll leave that to them, but encourage you to really think about what they say. That said, I'll tell you what I think about Couples Negril (CN) and Couples Swept Away (CSA).

Both are lovely. I've only slept at CN, but I did spend the day at CSA through the trading places program that you get to do if you are a Romance Rewards member. By the way, if you go Couples, definitely join that Romance Rewards program before you go. You will get extra perks and you can do the trading places thing for free which allows you to spend the day at another nearby Couples resort. You take a van over and spend like 10-4 there and get to enjoy all of their facilities. It is really nice. We did it and once we were over at CSA, we got off the resort and walked along 7-mile beach, exploring and eating! It was great. CSA is right on 7-mile beach and is a larger, more spread out resort. It doesn't have a central main space, but has very nice pools and beach area spread throughout the resort. Check out the work out facility on their website - it is supposed to be really nice. We had snacks at a couple of the places open for lunch and enjoyed it. CN is a smaller property, but I thought it was more charming than CSA. It is colorful and really nicely decorated with a great Jamaican vibe. Our room was comfortable and everything worked. We loved the food and thought the restaurants were really nice - especially the one with open air seating on the beach - so romantic. The pool was nice and it had a great lively swim-up pool bar scene. The beach was gorgeous. We loved it so much. The staff was awesome (actually, the staff was great at both places). We walked off the resort in the other direction (away from the 7-mile beach) and walked to the Office of Nature which was an awesome place that sold fresh caught lobster and red stripes. It was very nice and I recommend it highly.

We didn't scuba while we were there, but we did snorkel twice (once during the day and once at night) and we had a great time. The snorkeling wasn't as amazing as some places I have been but that doesn't mean it wasn't awesome. The night snorkeling was really cool (kinda scary though). The night snorkeling was one of the few things that cost extra. It was about 30 bucks I think. We also sailed on a hobie cat, tried water skiing and took the catamaran cruise to the cliffs. Great fun! We paid an off-site vendor to go horseback riding and we took the free trip to Rick's Cafe on the cliffs.

If you are set on an AI, I think Couples is a good option. I would recommend going to the Couples message board (they maintain one on the couples website) and read trip reports and comparisons over there. Some people do a split stay between CN and CSA and their trip reports might be especially helpful. Also, check out videos made by people at both resorts on Youtube and check out guests photographs on tripadvisor. You'll probably get more information about these specific resorts there than here.