Most points have been covered. There's plenty of boat diving on bonaire now a days. The reef is healthier, but the island itself is still quiet so if you're looking for things to do outside of dive probably Curacao. It's also inexpensive to fly between the two depending on how long your trip is. My last trip I did 10 days split and got to enjoy both islands.
Interesting. I've asked about boat diving and received limited responses. Any details of who to use?