Karpata to the north and Sweet Dreams to the south have unusually lush reefs.
Oil Slick Leap is a nice site, I've seen interesting animals there, and the option for giant stride in is one of Bonaire's signature things to do.
Hilma Hooker for the wreck and double reef system.
On your trip to Karpata, also hit Tolo (a.k.a.; Ol'Blue) - good site with pretty easy entry.
1,000 Steps is a good site, and that tall stair case (legs feel the burn heading up after your dive) is scenic for photos. I figure with 16 going, somebody is going to want a couples shot.
Richard.