Bali
I had the opportunity to visit Bali in July 2013. As far as the island itself, Bali is incredible! It is soaking with history, beauty, and culture - it is a really magical place. I'd highly recommend hiring a driver to take you a bit around the island to visit some of the temples, remote beaches, and other hidden places. The food on the island is absolutely terrific as well, and quite affordable.
As for the scuba diving in Bali, I had the opportunity of visiting Tulamben and doing the USS Liberty wreck, as well as Nusa Penida. The Liberty wreck is a very cool dive - neat wreck with some interesting features. Next to it is also a nice coral garden dive, where we saw black tip sharks, ribbon eel groves, and some really neat little critters including mantis shrimp. Nusa Penida was fantastic as well. We did two drift dives along some of the healthiest and most diverse coral I've ever seen. We also saw two very large mola molas, which I hear are quite common to see here.
Bali is a beautiful spot to spend some time above water, and definitely worth checking out for the underwater attractions as well. Recommended!