Would need more info from you. there are rooms for everyone ranging from $30 US per nite to $300+ US per nite. Do you want to be on the beach or on the cliffs?
What are your absolute requirements, eg AC, pool, hot & cold water, kitchette or not. Does room have to be on the beach or cliff side, or can it garden side or be across the road. If you provide an idea of what your room budget per night is, the boardies can give you some suggestions.

If you look at the top of this board and click on the HOTELS link, it will give you an idea of what is available. The dates you gave are High Season and rooms are in high demand as lots of tourists come for Xmas & New Years in Negil.