Mirage is great option if you don't mind forgoing a restaurant and bar (not a big deal since there are a number good spots within easy walking distance). They are currently running a great special at $80 a night.

I would also consider Home Sweet Home. You can probably get a good deal on the Penthouse that time of year. The Penthouse at HSH is one of the most underrated rooms in Negril - with a large veranda that literally hangs over the cliffs. If not, the standard Seaview Deluxe rooms should have everything you need.