On the island of Tahiti, I understand the Off the Beaten Path can be very hot and more difficult than the 4X4 tours on Bora Bora and Moorea. The Full Circle Tour can also get very hot, and depending on weather conditions (mainly rain) you may not make it all the way around. That being said, it is a shame though not to see any of the island other than Papeete because it really is beautiful. I never been but the Natural Treasures excursion may be a good compromise.

I'm surprised the shark feeding on Moorea is for scuba divers only, I have been on it a couple of times and it wasn't the case. Personally I think Bora Bora is better for the waverunners because the lagoon is better than Moorea (IMHO).