Tahiti vs Vanuatu vs Fiji?

out of tahiti, vanuatu and fiji whats better in December time for 14 days?
what has more to do/variety?
what has the most beautiful beaches?
whats cheaper?
whats the best option? and why?
can anyone give up some feedback

Tahiti easily most espensive, vanuatu cheapest when you are out of the towns. u need to figure out what u wanna do there. all have good adventure sport. all are large groups of islands, so inter-is travel is a bit of an issue and cost ; tahiti and moorea 2 main is. are close by and easy to get around. vanuatu has the most 3rd World remote dirt floor villages so its the most exciting and interesting, a lot of tribal cults . why leave home to stay in a hotel ? beaches vary all over. best read up first.